diff options
Diffstat (limited to 'examples/btpyparse.py')
| -rw-r--r-- | examples/btpyparse.py | 55 |
1 files changed, 32 insertions, 23 deletions
diff --git a/examples/btpyparse.py b/examples/btpyparse.py index 39e5261..81ca4b0 100644 --- a/examples/btpyparse.py +++ b/examples/btpyparse.py @@ -10,22 +10,36 @@ Submitted by Matthew Brett, 2010 Simplified BSD license
"""
-from pyparsing import (Regex, Suppress, ZeroOrMore, Group, Optional, Forward,
- SkipTo, CaselessLiteral, Dict)
+from pyparsing import (
+ Regex,
+ Suppress,
+ ZeroOrMore,
+ Group,
+ Optional,
+ Forward,
+ SkipTo,
+ CaselessLiteral,
+ Dict,
+)
class Macro:
""" Class to encapsulate undefined macro references """
+
def __init__(self, name):
self.name = name
+
def __repr__(self):
return 'Macro("%s")' % self.name
+
def __eq__(self, other):
return self.name == other.name
# Character literals
-LCURLY,RCURLY,LPAREN,RPAREN,QUOTE,COMMA,AT,EQUALS,HASH = map(Suppress,'{}()",@=#')
+LCURLY, RCURLY, LPAREN, RPAREN, QUOTE, COMMA, AT, EQUALS, HASH = map(
+ Suppress, '{}()",@=#'
+)
def bracketed(expr):
@@ -48,31 +62,30 @@ quoted_item = Group(curly_string) | chars_no_quotecurly quoted_string = QUOTE + ZeroOrMore(quoted_item) + QUOTE
# Numbers can just be numbers. Only integers though.
-number = Regex('[0-9]+')
+number = Regex("[0-9]+")
# Basis characters (by exclusion) for variable / field names. The following
# list of characters is from the btparse documentation
-any_name = Regex('[^\\s"#%\'(),={}]+')
+any_name = Regex("[^\\s\"#%'(),={}]+")
# btparse says, and the test bibs show by experiment, that macro and field names
# cannot start with a digit. In fact entry type names cannot start with a digit
# either (see tests/bibs). Cite keys can start with a digit
-not_digname = Regex('[^\\d\\s"#%\'(),={}][^\\s"#%\'(),={}]*')
+not_digname = Regex("[^\\d\\s\"#%'(),={}][^\\s\"#%'(),={}]*")
# Comment comments out to end of line
-comment = (AT + CaselessLiteral('comment') +
- Regex(r"[\s{(].*").leaveWhitespace())
+comment = AT + CaselessLiteral("comment") + Regex(r"[\s{(].*").leaveWhitespace()
# The name types with their digiteyness
not_dig_lower = not_digname.copy().setParseAction(lambda t: t[0].lower())
macro_def = not_dig_lower.copy()
-macro_ref = not_dig_lower.copy().setParseAction(lambda t : Macro(t[0].lower()))
+macro_ref = not_dig_lower.copy().setParseAction(lambda t: Macro(t[0].lower()))
field_name = not_dig_lower.copy()
# Spaces in names mean they cannot clash with field names
-entry_type = not_dig_lower('entry_type')
-cite_key = any_name('cite_key')
+entry_type = not_dig_lower("entry_type")
+cite_key = any_name("cite_key")
# Number has to be before macro name
-string = (number | macro_ref | quoted_string | curly_string)
+string = number | macro_ref | quoted_string | curly_string
# There can be hash concatenation
field_value = string + ZeroOrMore(HASH + string)
@@ -80,25 +93,21 @@ field_def = Group(field_name + EQUALS + field_value) entry_contents = Dict(ZeroOrMore(field_def + COMMA) + Optional(field_def))
# Entry is surrounded either by parentheses or curlies
-entry = (AT + entry_type + bracketed(cite_key + COMMA + entry_contents))
+entry = AT + entry_type + bracketed(cite_key + COMMA + entry_contents)
# Preamble is a macro-like thing with no name
-preamble = AT + CaselessLiteral('preamble') + bracketed(field_value)
+preamble = AT + CaselessLiteral("preamble") + bracketed(field_value)
# Macros (aka strings)
macro_contents = macro_def + EQUALS + field_value
-macro = AT + CaselessLiteral('string') + bracketed(macro_contents)
+macro = AT + CaselessLiteral("string") + bracketed(macro_contents)
# Implicit comments
-icomment = SkipTo('@').setParseAction(lambda t : t.insert(0, 'icomment'))
+icomment = SkipTo("@").setParseAction(lambda t: t.insert(0, "icomment"))
# entries are last in the list (other than the fallback) because they have
# arbitrary start patterns that would match comments, preamble or macro
-definitions = Group(comment |
- preamble |
- macro |
- entry |
- icomment)
+definitions = Group(comment | preamble | macro | entry | icomment)
# Start symbol
bibfile = ZeroOrMore(definitions)
@@ -108,7 +117,7 @@ def parse_str(str): return bibfile.parseString(str)
-if __name__ == '__main__':
+if __name__ == "__main__":
# Run basic test
txt = """
Some introductory text
@@ -124,4 +133,4 @@ Some introductory text number = {2}
}
"""
- print('\n\n'.join(defn.dump() for defn in parse_str(txt)))
+ print("\n\n".join(defn.dump() for defn in parse_str(txt)))
|