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@@ -96,14 +96,115 @@ def sorted(iterable, reverse=False, key=None):
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return a
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##### str #####
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-def __f(self, *args):
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- if '{}' in self:
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- for i in range(len(args)):
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- self = self.replace('{}', str(args[i]), 1)
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- else:
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- for i in range(len(args)):
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- self = self.replace('{'+str(i)+'}', str(args[i]))
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- return self
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+def __f(self: str, *args, **kwargs) -> str:
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+ def tokenizeString(s: str):
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+ tokens = []
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+ L, R = 0,0
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+
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+ mode = None
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+ curArg = 0
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+ # lookingForKword = False
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+
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+ while(R<len(s)):
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+ curChar = s[R]
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+ nextChar = s[R+1] if R+1<len(s) else ''
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+
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+ # Invalid case 1: stray '}' encountered, example: "ABCD EFGH {name} IJKL}", "Hello {vv}}", "HELLO {0} WORLD}"
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+ if curChar == '}' and nextChar != '}':
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+ raise ValueError("Single '}' encountered in format string")
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+
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+ # Valid Case 1: Escaping case, we escape "{{ or "}}" to be "{" or "}", example: "{{}}", "{{My Name is {0}}}"
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+ if (curChar == '{' and nextChar == '{') or (curChar == '}' and nextChar == '}'):
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+
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+ if (L<R): # Valid Case 1.1: make sure we are not adding empty string
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+ tokens.append(s[L:R]) # add the string before the escape
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+
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+
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+ tokens.append(curChar) # Valid Case 1.2: add the escape char
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+ L = R+2 # move the left pointer to the next char
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+ R = R+2 # move the right pointer to the next char
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+ continue
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+
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+ # Valid Case 2: Regular command line arg case: example: "ABCD EFGH {} IJKL", "{}", "HELLO {} WORLD"
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+ elif curChar == '{' and nextChar == '}':
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+ if mode is not None and mode != 'auto':
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+ # Invalid case 2: mixing automatic and manual field specifications -- example: "ABCD EFGH {name} IJKL {}", "Hello {vv} {}", "HELLO {0} WORLD {}"
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+ raise ValueError("Cannot switch from manual field numbering to automatic field specification")
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+
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+ mode = 'auto'
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+ if(L<R): # Valid Case 2.1: make sure we are not adding empty string
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+ tokens.append(s[L:R]) # add the string before the special marker for the arg
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+
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+ tokens.append("{"+str(curArg)+"}") # Valid Case 2.2: add the special marker for the arg
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+ curArg+=1 # increment the arg position, this will be used for referencing the arg later
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+
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+ L = R+2 # move the left pointer to the next char
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+ R = R+2 # move the right pointer to the next char
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+ continue
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+
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+ # Valid Case 3: Key-word arg case: example: "ABCD EFGH {name} IJKL", "Hello {vv}", "HELLO {name} WORLD"
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+ elif (curChar == '{'):
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+
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+ if mode is not None and mode != 'manual':
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+ # # Invalid case 2: mixing automatic and manual field specifications -- example: "ABCD EFGH {} IJKL {name}", "Hello {} {1}", "HELLO {} WORLD {name}"
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+ raise ValueError("Cannot switch from automatic field specification to manual field numbering")
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+
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+ mode = 'manual'
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+
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+ if(L<R): # Valid case 3.1: make sure we are not adding empty string
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+ tokens.append(s[L:R]) # add the string before the special marker for the arg
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+
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+ # We look for the end of the keyword
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+ kwL = R # Keyword left pointer
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+ kwR = R+1 # Keyword right pointer
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+ while(kwR<len(s) and s[kwR]!='}'):
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+ if s[kwR] == '{': # Invalid case 3: stray '{' encountered, example: "ABCD EFGH {n{ame} IJKL {", "Hello {vv{}}", "HELLO {0} WOR{LD}"
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+ raise ValueError("Unexpected '{' in field name")
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+ kwR += 1
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+
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+ # Valid case 3.2: We have successfully found the end of the keyword
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+ if kwR<len(s) and s[kwR] == '}':
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+ tokens.append(s[kwL:kwR+1]) # add the special marker for the arg
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+ L = kwR+1
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+ R = kwR+1
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+
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+ # Invalid case 4: We didn't find the end of the keyword, throw error
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+ else:
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+ raise ValueError("Expected '}' before end of string")
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+ continue
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+
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+ R = R+1
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+
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+
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+ # Valid case 4: We have reached the end of the string, add the remaining string to the tokens
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+ if L<R:
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+ tokens.append(s[L:R])
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+
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+ # print(tokens)
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+ return tokens
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+
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+ tokens = tokenizeString(self)
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+ argMap = {}
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+ for i, a in enumerate(args):
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+ argMap[str(i)] = a
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+ final_tokens = []
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+ for t in tokens:
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+ if t[0] == '{' and t[-1] == '}':
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+ key = t[1:-1]
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+ argMapVal = argMap.get(key, None)
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+ kwargsVal = kwargs.get(key, None)
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+
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+ if argMapVal is None and kwargsVal is None:
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+ raise ValueError("No arg found for token: "+t)
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+ elif argMapVal is not None:
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+ final_tokens.append(str(argMapVal))
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+ else:
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+ final_tokens.append(str(kwargsVal))
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+ else:
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+ final_tokens.append(t)
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+
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+ return ''.join(final_tokens)
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+
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str.format = __f
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def __f(self, chars=None):
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M Sai Kiran