regex - How to remove symbols from a string with Python
Sometimes it takes longer to figure out the regex than to just write it out in python: import string s = "how much for the maple syrup? $20.99? That's ricidulous!!!" for char in string.punctuation: s = s.replace(char, ' ') If you need other characters you can change it to use a white-list or extend your black-list. Sample white-list:
python - Remove all special characters, punctuation and spaces …
2011年4月30日 · In fact, if you insert the special character ^ at the first place of your regex, you will get the negation. Extra tip: if you also need to lowercase the result, you can make the regex even faster and easier, as long as you won't find any uppercase now. import re s = re.sub(r"[^a-z0-9]","",s.lower())
regex - Removing special characters and symbols from a string in …
2017年4月11日 · All of the options use Regular Expressions in order to match character sequences with certain characteristics, and the re.sub function, which sub-stitutes anything matched by the given regex by the second string argument. You can read more about Regular Expressions in Python here.
python - How do I detect symbols in a string using regular …
2011年1月24日 · However, there are times a user will create a course_name with symbols that mess up the word boundary regular expression I have set for class_name ( \b\b ). Having the metacharacters of regular expressions in a course_name makes the word boundary return False everytime since symbols are not words. QUESTION:
python - Regular expression to return all characters between two ...
Then, use re.search(regex_pattern, string_to_be_tested) to search for the pattern in the string to be tested. This will return a MatchObject which you can store to a temporary variable. You should then call it's group() method and pass 1 as an argument (to see the 'Group 1' we captured using parenthesis earlier).
strip punctuation with regex - python - Stack Overflow
2019年7月19日 · For those coming here looking for a way to distinguish between Unicode alphanumeric characters and everything else, while using Python 3.x, you can just use \w and \W in your regular expression. This just helped me code the Control-Shift-Left/Right functionality in a Tkinter text widget (to skip past all the stuff like punctuation before a word).
Python Regex Match Special Characters - Stack Overflow
2019年8月29日 · Python Regex Match Special Characters [duplicate] Ask Question Asked 5 years, 2 months ago. Modified 5 ...
regex - What do the "(?<!…)" symbols mean in a Python regular ...
2017年6月6日 · I have the regular expression re.sub(r"(?<!\s)\}", r' }', string). What does the (?<!…) sequence indicate?
symbols - What is the meaning of + in a regex? - Stack Overflow
2010年10月3日 · Now, when the regex engine tries to match against aaaaaaaab, the .* will again consume the entire string. However, since the engine will have reached the end of the string and the pattern is not yet satisfied (the .* consumed everything but the pattern still has to match b afterwards), it will backtrack , one character at a time, and try to ...
regex - In Python, how do I split a string and keep the separators ...
Here is a simple .split solution that works without regex.. This is an answer for Python split() without removing the delimiter, so not exactly what the original post asks but the other question was closed as a duplicate for this one.