aboutsummaryrefslogtreecommitdiffstats
path: root/env/lib/python3.10/site-packages/pyparsing/util.py
diff options
context:
space:
mode:
authorLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
committerLibravatarLibravatar Biswakalyan Bhuyan <biswa@surgot.in> 2022-11-13 23:46:45 +0530
commit9468226a9e2e2ab8cdd599f1d8538e860ca86120 (patch)
tree0a77ada226d6db80639f96b438bf83e4e756edb5 /env/lib/python3.10/site-packages/pyparsing/util.py
downloadidcard-9468226a9e2e2ab8cdd599f1d8538e860ca86120.tar.gz
idcard-9468226a9e2e2ab8cdd599f1d8538e860ca86120.tar.bz2
idcard-9468226a9e2e2ab8cdd599f1d8538e860ca86120.zip
id card generator
Diffstat (limited to 'env/lib/python3.10/site-packages/pyparsing/util.py')
-rw-r--r--env/lib/python3.10/site-packages/pyparsing/util.py235
1 files changed, 235 insertions, 0 deletions
diff --git a/env/lib/python3.10/site-packages/pyparsing/util.py b/env/lib/python3.10/site-packages/pyparsing/util.py
new file mode 100644
index 0000000..34ce092
--- /dev/null
+++ b/env/lib/python3.10/site-packages/pyparsing/util.py
@@ -0,0 +1,235 @@
+# util.py
+import warnings
+import types
+import collections
+import itertools
+from functools import lru_cache
+from typing import List, Union, Iterable
+
+_bslash = chr(92)
+
+
+class __config_flags:
+ """Internal class for defining compatibility and debugging flags"""
+
+ _all_names: List[str] = []
+ _fixed_names: List[str] = []
+ _type_desc = "configuration"
+
+ @classmethod
+ def _set(cls, dname, value):
+ if dname in cls._fixed_names:
+ warnings.warn(
+ "{}.{} {} is {} and cannot be overridden".format(
+ cls.__name__,
+ dname,
+ cls._type_desc,
+ str(getattr(cls, dname)).upper(),
+ )
+ )
+ return
+ if dname in cls._all_names:
+ setattr(cls, dname, value)
+ else:
+ raise ValueError("no such {} {!r}".format(cls._type_desc, dname))
+
+ enable = classmethod(lambda cls, name: cls._set(name, True))
+ disable = classmethod(lambda cls, name: cls._set(name, False))
+
+
+@lru_cache(maxsize=128)
+def col(loc: int, strg: str) -> int:
+ """
+ Returns current column within a string, counting newlines as line separators.
+ The first column is number 1.
+
+ Note: the default parsing behavior is to expand tabs in the input string
+ before starting the parsing process. See
+ :class:`ParserElement.parseString` for more
+ information on parsing strings containing ``<TAB>`` s, and suggested
+ methods to maintain a consistent view of the parsed string, the parse
+ location, and line and column positions within the parsed string.
+ """
+ s = strg
+ return 1 if 0 < loc < len(s) and s[loc - 1] == "\n" else loc - s.rfind("\n", 0, loc)
+
+
+@lru_cache(maxsize=128)
+def lineno(loc: int, strg: str) -> int:
+ """Returns current line number within a string, counting newlines as line separators.
+ The first line is number 1.
+
+ Note - the default parsing behavior is to expand tabs in the input string
+ before starting the parsing process. See :class:`ParserElement.parseString`
+ for more information on parsing strings containing ``<TAB>`` s, and
+ suggested methods to maintain a consistent view of the parsed string, the
+ parse location, and line and column positions within the parsed string.
+ """
+ return strg.count("\n", 0, loc) + 1
+
+
+@lru_cache(maxsize=128)
+def line(loc: int, strg: str) -> str:
+ """
+ Returns the line of text containing loc within a string, counting newlines as line separators.
+ """
+ last_cr = strg.rfind("\n", 0, loc)
+ next_cr = strg.find("\n", loc)
+ return strg[last_cr + 1 : next_cr] if next_cr >= 0 else strg[last_cr + 1 :]
+
+
+class _UnboundedCache:
+ def __init__(self):
+ cache = {}
+ cache_get = cache.get
+ self.not_in_cache = not_in_cache = object()
+
+ def get(_, key):
+ return cache_get(key, not_in_cache)
+
+ def set_(_, key, value):
+ cache[key] = value
+
+ def clear(_):
+ cache.clear()
+
+ self.size = None
+ self.get = types.MethodType(get, self)
+ self.set = types.MethodType(set_, self)
+ self.clear = types.MethodType(clear, self)
+
+
+class _FifoCache:
+ def __init__(self, size):
+ self.not_in_cache = not_in_cache = object()
+ cache = collections.OrderedDict()
+ cache_get = cache.get
+
+ def get(_, key):
+ return cache_get(key, not_in_cache)
+
+ def set_(_, key, value):
+ cache[key] = value
+ while len(cache) > size:
+ cache.popitem(last=False)
+
+ def clear(_):
+ cache.clear()
+
+ self.size = size
+ self.get = types.MethodType(get, self)
+ self.set = types.MethodType(set_, self)
+ self.clear = types.MethodType(clear, self)
+
+
+class LRUMemo:
+ """
+ A memoizing mapping that retains `capacity` deleted items
+
+ The memo tracks retained items by their access order; once `capacity` items
+ are retained, the least recently used item is discarded.
+ """
+
+ def __init__(self, capacity):
+ self._capacity = capacity
+ self._active = {}
+ self._memory = collections.OrderedDict()
+
+ def __getitem__(self, key):
+ try:
+ return self._active[key]
+ except KeyError:
+ self._memory.move_to_end(key)
+ return self._memory[key]
+
+ def __setitem__(self, key, value):
+ self._memory.pop(key, None)
+ self._active[key] = value
+
+ def __delitem__(self, key):
+ try:
+ value = self._active.pop(key)
+ except KeyError:
+ pass
+ else:
+ while len(self._memory) >= self._capacity:
+ self._memory.popitem(last=False)
+ self._memory[key] = value
+
+ def clear(self):
+ self._active.clear()
+ self._memory.clear()
+
+
+class UnboundedMemo(dict):
+ """
+ A memoizing mapping that retains all deleted items
+ """
+
+ def __delitem__(self, key):
+ pass
+
+
+def _escape_regex_range_chars(s: str) -> str:
+ # escape these chars: ^-[]
+ for c in r"\^-[]":
+ s = s.replace(c, _bslash + c)
+ s = s.replace("\n", r"\n")
+ s = s.replace("\t", r"\t")
+ return str(s)
+
+
+def _collapse_string_to_ranges(
+ s: Union[str, Iterable[str]], re_escape: bool = True
+) -> str:
+ def is_consecutive(c):
+ c_int = ord(c)
+ is_consecutive.prev, prev = c_int, is_consecutive.prev
+ if c_int - prev > 1:
+ is_consecutive.value = next(is_consecutive.counter)
+ return is_consecutive.value
+
+ is_consecutive.prev = 0
+ is_consecutive.counter = itertools.count()
+ is_consecutive.value = -1
+
+ def escape_re_range_char(c):
+ return "\\" + c if c in r"\^-][" else c
+
+ def no_escape_re_range_char(c):
+ return c
+
+ if not re_escape:
+ escape_re_range_char = no_escape_re_range_char
+
+ ret = []
+ s = "".join(sorted(set(s)))
+ if len(s) > 3:
+ for _, chars in itertools.groupby(s, key=is_consecutive):
+ first = last = next(chars)
+ last = collections.deque(
+ itertools.chain(iter([last]), chars), maxlen=1
+ ).pop()
+ if first == last:
+ ret.append(escape_re_range_char(first))
+ else:
+ sep = "" if ord(last) == ord(first) + 1 else "-"
+ ret.append(
+ "{}{}{}".format(
+ escape_re_range_char(first), sep, escape_re_range_char(last)
+ )
+ )
+ else:
+ ret = [escape_re_range_char(c) for c in s]
+
+ return "".join(ret)
+
+
+def _flatten(ll: list) -> list:
+ ret = []
+ for i in ll:
+ if isinstance(i, list):
+ ret.extend(_flatten(i))
+ else:
+ ret.append(i)
+ return ret