| |
- __builtin__.dict(__builtin__.object)
-
- multimap
- __builtin__.object
-
- AST
- Coerce
- NotNot
- RulesMaker
- productionHandler
-
- FilterExpr
- FromSparql
- __builtin__.tuple(__builtin__.object)
-
- TripleHolder
- andExtra
- __builtin__.unicode(__builtin__.basestring)
-
- typedThing
class AST(__builtin__.object) |
| |
Methods defined here:
- __init__(self, ast, sink=None)
- abbr(self, prodURI)
- onFinish(self)
- onStart(self, prod)
- onToken(self, prod, tok)
- prod(self, thing)
- run(self)
Data and other attributes defined here:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'AST' objects>
- list of weak references to the object (if defined)
|
class Coerce(__builtin__.object) |
| |
Methods defined here:
- __call__(self, expr, coerce=True)
- __init__(self)
- atom(self, p, coerce)
- on_And(self, p, coerce)
- on_BoolVal(self, p, coerce)
- on_Boolean(self, p, coerce)
- on_Bound(self, p, coerce)
- on_Not(self, p, coerce)
- on_Or(self, p, coerce)
- on_Regex(self, p, coerce)
- on_function(self, p, coerce)
- on_isBlank(self, p, coerce)
- on_isLiteral(self, p, coerce)
- on_isURI(self, p, coerce)
- on_math(self, p, coerce)
- on_pred(self, p, coerce)
Data and other attributes defined here:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'Coerce' objects>
- list of weak references to the object (if defined)
|
class FilterExpr(productionHandler) |
| |
- Method resolution order:
- FilterExpr
- productionHandler
- __builtin__.object
Methods defined here:
- __init__(self, store, parent)
- arithmetic(self, p, op)
- compare(self, p, op)
- on_And(self, p)
- on_BoolVal(self, p)
- on_Boolean(self, p)
- on_Bound(self, var)
- on_Literal(self, p)
- on_Not(self, p)
- on_Number(self, p)
- on_Or(self, p)
- on_Regex(self, p)
- on_String(self, p)
- on_Var(self, p)
- on_add(self, p)
- on_datatype(self, p)
- on_divide(self, p)
- on_equal(self, p)
- on_funcName(self, p)
- on_function(self, p)
- on_greater(self, p)
- on_isNotURI(self, p)
- on_isURI(self, p)
- on_lang(self, p)
- on_less(self, p)
- on_multiply(self, p)
- on_notBound(self, var)
- on_notEqual(self, p)
- on_notGreater(self, p)
- on_notLess(self, p)
- on_subtract(self, p)
- on_symbol(self, p)
- typeConvert(self, keepGoing, uri, val)
Methods inherited from productionHandler:
- prod(self, production)
Data and other attributes inherited from productionHandler:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'productionHandler' objects>
- list of weak references to the object (if defined)
|
class FromSparql(productionHandler) |
| |
- Method resolution order:
- FromSparql
- productionHandler
- __builtin__.object
Methods defined here:
- __init__(self, store, formula=None, ve=0, why=None)
- absolutize(self, uri)
- anonymize(self, formula, uri=None)
- makePatterns(self, f, node, patterns)
- new_bnode(self)
- on_AdditiveExpression(self, p)
- on_ArgList(self, p)
- on_AskQuery(self, p)
- on_BaseDecl(self, p)
- on_BlankNode(self, p)
- on_BlankNodePropertyList(self, p)
- on_BooleanLiteral(self, p)
- on_BrackettedExpression(self, p)
- on_BuiltinCallExpression(self, p)
- on_CallExpression(self, p)
- on_Collection(self, p)
- on_ConditionalAndExpression(self, p)
- on_ConditionalOrExpression(self, p)
- on_Constraint(self, p)
- on_ConstructQuery(self, p)
- on_ConstructTemplate(self, p)
- on_DatasetClause(self, p)
- on_DefaultGraphClause(self, p)
- on_DescribeQuery(self, p)
- on_Expression(self, p)
- on_FunctionCall(self, p)
- on_GraphGraphPattern(self, p)
- on_GraphNode(self, p)
- on_GraphPatternList(self, p)
- on_GraphPatternListTail(self, p)
- on_GraphPatternNotTriples(self, p)
- on_GraphPatternNotTriplesList(self, p)
- on_GraphPatternNotTriplesTail(self, p)
- on_GraphTerm(self, p)
- on_GroupGraphPattern(self, p, fromFilter=False)
- on_GroupOrUnionGraphPattern(self, p)
- on_IRIref(self, p)
- on_IRIrefOrFunc(self, p)
- on_LimitClause(self, p)
- on_MultiplicativeExpression(self, p)
- on_NamedGraphClause(self, p)
- on_NamelessBlank(self, p)
- on_NumericExpression(self, p)
- on_NumericLiteral(self, p)
- on_Object(self, p)
- on_ObjectList(self, p)
- on_OffsetClause(self, p)
- on_OptionalGraphPattern(self, p)
- on_OrderClause(self, p)
- on_OrderCondition(self, p)
- on_PrefixDecl(self, p)
- on_PrimaryExpression(self, p)
- on_Prolog(self, p)
- on_PropertyList(self, p)
- on_PropertyListNotEmpty(self, p)
- on_QName(self, p)
- on_Query(self, p)
- on_RDFLiteral(self, p)
- on_RDFTerm(self, p)
- on_RDFTermOrFunc(self, p)
- on_RegexExpression(self, p)
- on_RelationalExpression(self, p)
- on_SelectQuery(self, p)
- on_SolutionModifier(self, p)
- on_SourceSelector(self, p)
- on_String(self, p)
- on_Triples(self, p)
- on_Triples1(self, p)
- on_Triples2(self, p)
- on_Triples3(self, p)
- on_TriplesNode(self, p)
- on_UnaryExpression(self, p)
- on_ValueLogical(self, p)
- on_Var(self, p)
- on_VarOrBlankNodeOrIRIref(self, p)
- on_VarOrIRIref(self, p)
- on_VarOrTerm(self, p)
- on_Verb(self, p)
- on_WhereClause(self, p)
- on__O_QAND_E____QValueLogical_E__C(self, p)
- on__O_QASC_E__Or__QDESC_E__C(self, p)
- on__O_QASC_E__Or__QDESC_E____QBrackettedExpression_E__C(self, p)
- on__O_QBrackettedExpression_E__Or__QCallExpression_E__C(self, p)
- see normalize for an explanation of what we are doing
- on__O_QCOMMA_E____QExpression_E__C(self, p)
- on__O_QCOMMA_E____QObjectList_E__C(self, p)
- on__O_QDTYPE_E____QIRIref_E__C(self, p)
- on__O_QDefaultGraphClause_E__Or__QNamedGraphClause_E__C(self, p)
- on__O_QDot_E_Opt___QGraphPatternList_E__C(self, p)
- on__O_QDot_E____QGraphPatternList_E__C(self, p)
- on__O_QDot_E____QTriples_E_Opt_C(self, p)
- on__O_QEQUAL_E____QNumericExpression_E__Or__QNEQUAL_E____QNumericExpression_E__Or__QLT_E____QNumericExpression_E__Or__QGT_E____QNumericExpression_E__Or__QLE_E____QNumericExpression_E__Or__QGE_E____QNumericExpression_E__C(self, p)
- on__O_QExpression_E____QCOMMA_E____QExpression_E_Star_C(self, p)
- on__O_QFunctionCall_E__Or__QVar_E__Or__QBrackettedExpression_E__C(self, p)
- on__O_QLANGTAG_E__Or__QDTYPE_E____QIRIref_E__C(self, p)
- on__O_QOR_E____QConditionalAndExpression_E__C(self, p)
- on__O_QPLUS_E____QMultiplicativeExpression_E__Or__QMINUS_E____QMultiplicativeExpression_E__C(self, p)
- on__O_QSEMI_E____QPropertyList_E__C(self, p)
- on__O_QSelectQuery_E__Or__QConstructQuery_E__Or__QDescribeQuery_E__Or__QAskQuery_E__C(self, p)
- on__O_QTIMES_E____QUnaryExpression_E__Or__QDIVIDE_E____QUnaryExpression_E__C(self, p)
- on__O_QTriples1_E____QGraphPatternListTail_E__Or__QGraphPatternNotTriples_E____QGraphPatternNotTriplesTail_E__C(self, p)
- on__O_QUNION_E____QGroupGraphPattern_E__C(self, p)
- on__O_QVarOrIRIref_E_Plus_Or__QTIMES_E__C(self, p)
- on__O_QVar_E_Plus_Or__QTIMES_E__C(self, p)
- on__QArgList_E_Opt(self, p)
- on__QBaseDecl_E_Opt(self, p)
- on__QDISTINCT_E_Opt(self, p)
- on__QDatasetClause_E_Star(self, p)
- on__QDot_E_Opt(self, p)
- on__QGraphNode_E_Plus(self, p)
- on__QGraphNode_E_Star(self, p)
- on__QLimitClause_E_Opt(self, p)
- on__QOffsetClause_E_Opt(self, p)
- on__QOrderClause_E_Opt(self, p)
- on__QOrderCondition_E_Plus(self, p)
- on__QPrefixDecl_E_Star(self, p)
- on__QPropertyListNotEmpty_E_Opt(self, p)
- on__QTriples_E_Opt(self, p)
- on__QVarOrIRIref_E_Plus(self, p)
- on__QVar_E_Plus(self, p)
- on__QWHERE_E_Opt(self, p)
- on__QWhereClause_E_Opt(self, p)
- on__Q_O_QAND_E____QValueLogical_E__C_E_Star(self, p)
- on__Q_O_QCOMMA_E____QExpression_E__C_E_Opt(self, p)
- on__Q_O_QCOMMA_E____QExpression_E__C_E_Star(self, p)
- on__Q_O_QCOMMA_E____QObjectList_E__C_E_Opt(self, p)
- on__Q_O_QDot_E____QGraphPatternList_E__C_E_Opt(self, p)
- on__Q_O_QDot_E____QTriples_E_Opt_C_E_Opt(self, p)
- on__Q_O_QEQUAL_E____QNumericExpression_E__Or__QNEQUAL_E____QNumericExpression_E__Or__QLT_E____QNumericExpression_E__Or__QGT_E____QNumericExpression_E__Or__QLE_E____QNumericExpression_E__Or__QGE_E____QNumericExpression_E__C_E_Opt(self, p)
- on__Q_O_QExpression_E____QCOMMA_E____QExpression_E_Star_C_E_Opt(self, p)
- on__Q_O_QLANGTAG_E__Or__QDTYPE_E____QIRIref_E__C_E_Opt(self, p)
- on__Q_O_QOR_E____QConditionalAndExpression_E__C_E_Star(self, p)
- on__Q_O_QPLUS_E____QMultiplicativeExpression_E__Or__QMINUS_E____QMultiplicativeExpression_E__C_E_Star(self, p)
- on__Q_O_QSEMI_E____QPropertyList_E__C_E_Opt(self, p)
- on__Q_O_QTIMES_E____QUnaryExpression_E__Or__QDIVIDE_E____QUnaryExpression_E__C_E_Star(self, p)
- on__Q_O_QTriples1_E____QGraphPatternListTail_E__Or__QGraphPatternNotTriples_E____QGraphPatternNotTriplesTail_E__C_E_Opt(self, p)
- on__Q_O_QUNION_E____QGroupGraphPattern_E__C_E_Star(self, p)
Methods inherited from productionHandler:
- prod(self, production)
Data and other attributes inherited from productionHandler:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'productionHandler' objects>
- list of weak references to the object (if defined)
|
class NotNot(__builtin__.object) |
|
This class is used to figure out the inverses of all SPARQL boolean tests, and invert all functions |
|
Methods defined here:
- __call__(self, expr, inv=False, Ored=False)
- __init__(self)
- atom(self, p, inv, ored)
- expr(self, p, inv, ored)
- on_And(self, p, inv, ored)
- on_BoolVal(self, p, inv, ored)
- on_Not(self, p, inv, ored)
- on_Or(self, p, inv, ored)
- on_Regex(self, p, inv, ored)
- on_notMatches(self, p, inv)
Data and other attributes defined here:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'NotNot' objects>
- list of weak references to the object (if defined)
- inverse_operators = {'Bound': 'notBound', 'equal': 'notEqual', 'greater': 'notGreater', 'isBlank': 'isNotBlank', 'isLiteral': 'isNotLiteral', 'isNotBlank': 'isBlank', 'isNotLiteral': 'isLiteral', 'isNotURI': 'isURI', 'isURI': 'isNotURI', 'less': 'notLess', ...}
|
class multimap(__builtin__.dict) |
|
A class to handle where each element maps to a set of elements
It would perhaps be simpler to have used dict.setdefault(), but this has the
advantage of merging instead of nesting sets |
|
- Method resolution order:
- multimap
- __builtin__.dict
- __builtin__.object
Methods defined here:
- __add__(self, other)
- __init__(self, olddict={}, **values)
- __setitem__(self, key, value)
- translate(self, fromkey, tokey)
- update(self, other={}, **values)
Class methods defined here:
- fromTuples = _fromTuples(cls, iterator) from __builtin__.type
Data and other attributes defined here:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'multimap' objects>
- list of weak references to the object (if defined)
- innerSet = <class 'sparql2cwm.innerSet'>
Methods inherited from __builtin__.dict:
- __cmp__(...)
- x.__cmp__(y) <==> cmp(x,y)
- __contains__(...)
- D.__contains__(k) -> True if D has a key k, else False
- __delitem__(...)
- x.__delitem__(y) <==> del x[y]
- __eq__(...)
- x.__eq__(y) <==> x==y
- __ge__(...)
- x.__ge__(y) <==> x>=y
- __getattribute__(...)
- x.__getattribute__('name') <==> x.name
- __getitem__(...)
- x.__getitem__(y) <==> x[y]
- __gt__(...)
- x.__gt__(y) <==> x>y
- __hash__(...)
- x.__hash__() <==> hash(x)
- __iter__(...)
- x.__iter__() <==> iter(x)
- __le__(...)
- x.__le__(y) <==> x<=y
- __len__(...)
- x.__len__() <==> len(x)
- __lt__(...)
- x.__lt__(y) <==> x<y
- __ne__(...)
- x.__ne__(y) <==> x!=y
- __repr__(...)
- x.__repr__() <==> repr(x)
- clear(...)
- D.clear() -> None. Remove all items from D.
- copy(...)
- D.copy() -> a shallow copy of D
- get(...)
- D.get(k[,d]) -> D[k] if k in D, else d. d defaults to None.
- has_key(...)
- D.has_key(k) -> True if D has a key k, else False
- items(...)
- D.items() -> list of D's (key, value) pairs, as 2-tuples
- iteritems(...)
- D.iteritems() -> an iterator over the (key, value) items of D
- iterkeys(...)
- D.iterkeys() -> an iterator over the keys of D
- itervalues(...)
- D.itervalues() -> an iterator over the values of D
- keys(...)
- D.keys() -> list of D's keys
- pop(...)
- D.pop(k[,d]) -> v, remove specified key and return the corresponding value
If key is not found, d is returned if given, otherwise KeyError is raised
- popitem(...)
- D.popitem() -> (k, v), remove and return some (key, value) pair as a
2-tuple; but raise KeyError if D is empty
- setdefault(...)
- D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D
- values(...)
- D.values() -> list of D's values
Data and other attributes inherited from __builtin__.dict:
- __new__ = <built-in method __new__ of type object at 0xfde34>
- T.__new__(S, ...) -> a new object with type S, a subtype of T
- fromkeys = <built-in method fromkeys of type object>
- dict.fromkeys(S[,v]) -> New dict with keys from S and values equal to v.
v defaults to None.
|
class productionHandler(__builtin__.object) |
| |
Methods defined here:
- prod(self, production)
Data and other attributes defined here:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'productionHandler' objects>
- list of weak references to the object (if defined)
|
class typedThing(__builtin__.unicode) |
| |
- Method resolution order:
- typedThing
- __builtin__.unicode
- __builtin__.basestring
- __builtin__.object
Methods defined here:
- __call__(self)
Static methods defined here:
- __new__(cls, val, retType=None, ArgTypes=[], trueOnError=False)
Data and other attributes defined here:
- __dict__ = <dictproxy object>
- dictionary for instance variables (if defined)
- __weakref__ = <attribute '__weakref__' of 'typedThing' objects>
- list of weak references to the object (if defined)
Methods inherited from __builtin__.unicode:
- __add__(...)
- x.__add__(y) <==> x+y
- __cmp__(...)
- x.__cmp__(y) <==> cmp(x,y)
- __contains__(...)
- x.__contains__(y) <==> y in x
- __getattribute__(...)
- x.__getattribute__('name') <==> x.name
- __getitem__(...)
- x.__getitem__(y) <==> x[y]
- __getnewargs__(...)
- __getslice__(...)
- x.__getslice__(i, j) <==> x[i:j]
Use of negative indices is not supported.
- __hash__(...)
- x.__hash__() <==> hash(x)
- __len__(...)
- x.__len__() <==> len(x)
- __mod__(...)
- x.__mod__(y) <==> x%y
- __mul__(...)
- x.__mul__(n) <==> x*n
- __repr__(...)
- x.__repr__() <==> repr(x)
- __rmod__(...)
- x.__rmod__(y) <==> y%x
- __rmul__(...)
- x.__rmul__(n) <==> n*x
- __str__(...)
- x.__str__() <==> str(x)
- capitalize(...)
- S.capitalize() -> unicode
Return a capitalized version of S, i.e. make the first character
have upper case.
- center(...)
- S.center(width[, fillchar]) -> unicode
Return S centered in a Unicode string of length width. Padding is
done using the specified fill character (default is a space)
- count(...)
- S.count(sub[, start[, end]]) -> int
Return the number of occurrences of substring sub in Unicode string
S[start:end]. Optional arguments start and end are
interpreted as in slice notation.
- decode(...)
- S.decode([encoding[,errors]]) -> string or unicode
Decodes S using the codec registered for encoding. encoding defaults
to the default encoding. errors may be given to set a different error
handling scheme. Default is 'strict' meaning that encoding errors raise
a UnicodeDecodeError. Other possible values are 'ignore' and 'replace'
as well as any other name registerd with codecs.register_error that is
able to handle UnicodeDecodeErrors.
- encode(...)
- S.encode([encoding[,errors]]) -> string or unicode
Encodes S using the codec registered for encoding. encoding defaults
to the default encoding. errors may be given to set a different error
handling scheme. Default is 'strict' meaning that encoding errors raise
a UnicodeEncodeError. Other possible values are 'ignore', 'replace' and
'xmlcharrefreplace' as well as any other name registered with
codecs.register_error that can handle UnicodeEncodeErrors.
- endswith(...)
- S.endswith(suffix[, start[, end]]) -> bool
Return True if S ends with the specified suffix, False otherwise.
With optional start, test S beginning at that position.
With optional end, stop comparing S at that position.
- expandtabs(...)
- S.expandtabs([tabsize]) -> unicode
Return a copy of S where all tab characters are expanded using spaces.
If tabsize is not given, a tab size of 8 characters is assumed.
- find(...)
- S.find(sub [,start [,end]]) -> int
Return the lowest index in S where substring sub is found,
such that sub is contained within s[start,end]. Optional
arguments start and end are interpreted as in slice notation.
Return -1 on failure.
- index(...)
- S.index(sub [,start [,end]]) -> int
Like S.find() but raise ValueError when the substring is not found.
- isalnum(...)
- S.isalnum() -> bool
Return True if all characters in S are alphanumeric
and there is at least one character in S, False otherwise.
- isalpha(...)
- S.isalpha() -> bool
Return True if all characters in S are alphabetic
and there is at least one character in S, False otherwise.
- isdecimal(...)
- S.isdecimal() -> bool
Return True if there are only decimal characters in S,
False otherwise.
- isdigit(...)
- S.isdigit() -> bool
Return True if all characters in S are digits
and there is at least one character in S, False otherwise.
- islower(...)
- S.islower() -> bool
Return True if all cased characters in S are lowercase and there is
at least one cased character in S, False otherwise.
- isnumeric(...)
- S.isnumeric() -> bool
Return True if there are only numeric characters in S,
False otherwise.
- isspace(...)
- S.isspace() -> bool
Return True if all characters in S are whitespace
and there is at least one character in S, False otherwise.
- istitle(...)
- S.istitle() -> bool
Return True if S is a titlecased string and there is at least one
character in S, i.e. upper- and titlecase characters may only
follow uncased characters and lowercase characters only cased ones.
Return False otherwise.
- isupper(...)
- S.isupper() -> bool
Return True if all cased characters in S are uppercase and there is
at least one cased character in S, False otherwise.
- join(...)
- S.join(sequence) -> unicode
Return a string which is the concatenation of the strings in the
sequence. The separator between elements is S.
- ljust(...)
- S.ljust(width[, fillchar]) -> int
Return S left justified in a Unicode string of length width. Padding is
done using the specified fill character (default is a space).
- lower(...)
- S.lower() -> unicode
Return a copy of the string S converted to lowercase.
- lstrip(...)
- S.lstrip([chars]) -> unicode
Return a copy of the string S with leading whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is a str, it will be converted to unicode before stripping
- replace(...)
- S.replace (old, new[, maxsplit]) -> unicode
Return a copy of S with all occurrences of substring
old replaced by new. If the optional argument maxsplit is
given, only the first maxsplit occurrences are replaced.
- rfind(...)
- S.rfind(sub [,start [,end]]) -> int
Return the highest index in S where substring sub is found,
such that sub is contained within s[start,end]. Optional
arguments start and end are interpreted as in slice notation.
Return -1 on failure.
- rindex(...)
- S.rindex(sub [,start [,end]]) -> int
Like S.rfind() but raise ValueError when the substring is not found.
- rjust(...)
- S.rjust(width[, fillchar]) -> unicode
Return S right justified in a Unicode string of length width. Padding is
done using the specified fill character (default is a space).
- rsplit(...)
- S.rsplit([sep [,maxsplit]]) -> list of strings
Return a list of the words in S, using sep as the
delimiter string, starting at the end of the string and
working to the front. If maxsplit is given, at most maxsplit
splits are done. If sep is not specified, any whitespace string
is a separator.
- rstrip(...)
- S.rstrip([chars]) -> unicode
Return a copy of the string S with trailing whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is a str, it will be converted to unicode before stripping
- split(...)
- S.split([sep [,maxsplit]]) -> list of strings
Return a list of the words in S, using sep as the
delimiter string. If maxsplit is given, at most maxsplit
splits are done. If sep is not specified or is None,
any whitespace string is a separator.
- splitlines(...)
- S.splitlines([keepends]]) -> list of strings
Return a list of the lines in S, breaking at line boundaries.
Line breaks are not included in the resulting list unless keepends
is given and true.
- startswith(...)
- S.startswith(prefix[, start[, end]]) -> bool
Return True if S starts with the specified prefix, False otherwise.
With optional start, test S beginning at that position.
With optional end, stop comparing S at that position.
- strip(...)
- S.strip([chars]) -> unicode
Return a copy of the string S with leading and trailing
whitespace removed.
If chars is given and not None, remove characters in chars instead.
If chars is a str, it will be converted to unicode before stripping
- swapcase(...)
- S.swapcase() -> unicode
Return a copy of S with uppercase characters converted to lowercase
and vice versa.
- title(...)
- S.title() -> unicode
Return a titlecased version of S, i.e. words start with title case
characters, all remaining cased characters have lower case.
- translate(...)
- S.translate(table) -> unicode
Return a copy of the string S, where all characters have been mapped
through the given translation table, which must be a mapping of
Unicode ordinals to Unicode ordinals, Unicode strings or None.
Unmapped characters are left untouched. Characters mapped to None
are deleted.
- upper(...)
- S.upper() -> unicode
Return a copy of S converted to uppercase.
- zfill(...)
- S.zfill(width) -> unicode
Pad a numeric string x with zeros on the left, to fill a field
of the specified width. The string x is never truncated.
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