How to use the parsita.util.constant function in parsita
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drhagen / parsita / examples / json.py View on Github 
from parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > floatfrom parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
false = lit('false') > constant(False)
true = lit('true') > constant(True)
null = lit('null') > constant(None)from parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.jointab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
false = lit('false') > constant(False)
true = lit('true') > constant(True)
null = lit('null') > constant(None)
string = JsonStringParsers.string
array = '[' >> repsep(value, ',') << ']'
entry = string << ':' & value
obj = '{' >> repsep(entry, ',') << '}' > dict
value = number | false | true | null | string | array | obj
if __name__ == '__main__':
strings = [
'"name"',
'-12.40e2',
'[false, true, null]',line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
false = lit('false') > constant(False)
true = lit('true') > constant(True)
null = lit('null') > constant(None)
string = JsonStringParsers.string
array = '[' >> repsep(value, ',') << ']'
entry = string << ':' & value
obj = '{' >> repsep(entry, ',') << '}' > dict
value = number | false | true | null | string | array | obj
if __name__ == '__main__':
strings = [
'"name"',from parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
false = lit('false') > constant(False)
true = lit('true') > constant(True)from parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):from parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
false = lit('false') > constant(False)carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
false = lit('false') > constant(False)
true = lit('true') > constant(True)
null = lit('null') > constant(None)
string = JsonStringParsers.string
array = '[' >> repsep(value, ',') << ']'
entry = string << ':' & value
obj = '{' >> repsep(entry, ',') << '}' > dict
value = number | false | true | null | string | array | obj
if __name__ == '__main__':
strings = [
'"name"',
'-12.40e2',from parsita import *
from parsita.util import constant
# JSON definition according to https://tools.ietf.org/html/rfc7159
class JsonStringParsers(TextParsers, whitespace=None):
quote = lit(r'\"') > constant('"')
reverse_solidus = lit(r'\\') > constant('\\')
solidus = lit(r'\/') > constant('/')
backspace = lit(r'\b') > constant('\b')
form_feed = lit(r'\f') > constant('\f')
line_feed = lit(r'\n') > constant('\n')
carriage_return = lit(r'\r') > constant('\r')
tab = lit(r'\t') > constant('\t')
uni = reg(r'\\u([0-9a-fA-F]{4})') > (lambda x: chr(int(x.group(1), 16)))
escaped = (quote | reverse_solidus | solidus | backspace | form_feed
| line_feed | carriage_return | tab | uni)
unescaped = reg(r'[\u0020-\u0021\u0023-\u005B\u005D-\U0010FFFF]+')
string = '"' >> rep(escaped | unescaped) << '"' > ''.join
class JsonParsers(TextParsers, whitespace=r'[ \t\n\r]*'):
number = reg(r'-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][-+]?[0-9]+)?') > float
