aString = "hello world"
aString.startswith("hello")
More info about startswith.
Top answer 1 of 6
854
aString = "hello world"
aString.startswith("hello")
More info about startswith.
2 of 6
142
RanRag has already answered it for your specific question.
However, more generally, what you are doing with
if [[ "$string" =~ ^hello ]]
is a regex match. To do the same in Python, you would do:
import re
if re.match(r'^hello', somestring):
# do stuff
Obviously, in this case, somestring.startswith('hello') is better.
Finxter
blog.finxter.com › home › learn python blog › you cannot use python regex in startswith(). do this instead.
You Cannot Use Python Regex in startswith(). Do This Instead. - Be on the Right Side of Change
June 19, 2022 - Now that you know everything about Python’s startswith method, let’s go back to our original question: No. The startswith method does not allow for a regular expressions. You can only search for a string.
How can I match the start and end in Python's regex? - Stack Overflow
I have a string and I want to match something at the start and end with a single search pattern. How can this be done? Let's say we have a string like: string = "ftp://www.somewhere.com/over/the/ More on stackoverflow.com
Python - regex search for string which starts and ends with the given text - Stack Overflow
I have a list of files, and I want to keep only the ones which start with 'test_' and end with '.py'. I want the regex to only return the text inside the 'test_' and '.py'. I do not want .pyc files More on stackoverflow.com
Regex for all words starting with "Con" or "con" in file
I suspect you need a leading word-boundary assertion \b you want a character-class around your vowels […] you want the "con" bits bracketed together so that neither can be followed by a vowel so you would either group them (Con|con)(?![AEIOUaeiou]) or use a character-class to collapse them `[Cc]on(?! if you want to return the whole word, you can capture that, too So I'm guessing that would be something like \b[cC]on(?![aeiouAEIOU])[a-z]* If terms-of-interest can include other non-lowercase letters, adjust that last character-class ("conditioning-unit", "Conn'ed", "conn5") More on reddit.com
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March 9, 2023How to remove string that start with "\*" and end with "*\" in python
You can use regular expressions to remove the string that starts with "*" and ends with "*" in python. Here is one way to do it using the re module: import re text = "text \* text *\ text" # Use regular expression to remove the string new_text = re.sub(r"\\\*.*?\*\\", "", text) print(new_text) This will output: text text The regular expression r"\\\*.*?\*\\" matches any string that starts with "\" and ends with "\", and the re.sub() function replaces it with an empty string. Alternatively, you could use string slicing to get the same result as follows: text = "text \* text *\ text" start = text.index("\\*") + 2 end = text.index("*\\") new_text = text[:start-2] + text[end+2:] print(new_text) This will output: text text More on reddit.com
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December 19, 2022GeeksforGeeks
geeksforgeeks.org › python › how-to-check-if-a-string-starts-with-a-substring-using-regex-in-python
How to Check if a String Starts with a Substring Using Regex in Python? - GeeksforGeeks
November 4, 2025 - The ^ (caret) metacharacter in regex is used to match text only at the start of the string. We can use it with re.search() to check if the string begins with the given substring.
W3Schools
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Python String startswith() Method
Remove List Duplicates Reverse ... Q&A Python Training ... The startswith() method returns True if the string starts with the specified value, otherwise False....
Python Examples
pythonexamples.org › python-regex-check-if-string-starts-with-specific-word
Check if String Starts with Specific Word - Regex - Python
To check if a string starts with a word in Python, use the regular expression for "starts with" ^ and the word itself. We will use re.search() function to do an expression match against the string.
W3Schools
w3schools.com › python › python_regex.asp
Python RegEx
RegEx can be used to check if a string contains the specified search pattern. ... Python has a built-in package called re, which can be used to work with Regular Expressions.
Programiz
programiz.com › python-programming › methods › string › startswith
Python String startswith()
Online Python Online JavaScript ... Online Go Online Rust Online Scala Online Dart Online R Online Ruby ... The startswith() method returns True if a string starts with the specified prefix(string)....
TutorialsPoint
tutorialspoint.com › how-to-match-at-the-beginning-of-string-in-python-using-regular-expression
How to match at the beginning of string in python using Regular Expression?
April 23, 2025 - To match the beginning of the string in Python by using a regular expression, we use the ^\w+ regular expression.
EyeHunts
tutorial.eyehunts.com › home › python string starts with regex | example code
Python string starts with regex | Example code - EyeHunts
July 29, 2021 - Series.str.startswith doesn’t accept regex because it is intended to behave similarly to str.startswith in vanilla Python, which does not accept regex. The alternative is to use a regex match.
TutorialsPoint
tutorialspoint.com › python-program-to-check-if-a-string-starts-with-a-substring-using-regex
Python Program to check if a string starts with a substring using regex
September 20, 2021 - import re def check_string(my_string, sub_string) : if (sub_string in my_string): concat_string = "^" + sub_string result = re.search(concat_string, my_string) if result : print("The string starts with the given substring") else : print("The string doesnot start with the given substring") else : print("It is not a substring") my_string = "Python coding is fun to learn" sub_string = "Python" print("The string is :") print(my_string) print("The sub-string is :") print(sub_string) check_string(my_string, sub_string)
TutorialsPoint
tutorialspoint.com › how-can-i-match-the-start-and-end-in-python-s-regex
How can I match the start and end in Python\'s regex?
June 8, 2025 - import re text = "Learn Python Programming" if re.search(r"Programming$", text): print("Ends with 'Programming'") else: print("Does not end with 'Programming'") ... If we want to match an entire string exactly, from the beginning to the end, we can combine the anchors "^" and "$". If the pattern is the desired word/regex placed between these two symbols, the re.match() matches a string that starts and ends with the specified pattern ?
Fabian Lee
fabianlee.org › 2021 › 02 › 20 › python-exploring-the-use-of-startswith-against-a-list-tuple-regex-list-comprehension-lambda
Python: exploring the use of startswith against a list: tuple, regex, list comprehension, lambda | Fabian Lee : Software Engineer
February 24, 2021 - A regex is constructed with the following syntax “^value1|^value2|^value3”, where the caret means match the beginning of the string and the pipe sign is an OR so that multiple expressions are tested. The third implementation uses list comprehension and “if” filter to only select the values from the list that match. cidr_matches = [ cidr for cidr in PRIVATE_IP_LIST if userip.startswith(cidr) ] if len(cidr_matches)>0: print("YES '{}' is a private IPv4 address starting with this range: {}".format(userip,cidr_matches)) else: print("NO '{}' is not a private IPv4 address".format(userip))
HowToDoInJava
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Python: Check if String Starts or Ends with a Substring
April 22, 2024 - import re # Input String text = "HowToDoInJava.com" # Specified substrings to check start = "How" end = "com" # Using regex to check if the string starts with the specified substring if re.search(f"^{re.escape(start)}", text): print("String starts with the specified substring.") else: print("String does not start with the specified substring.") # Using regex to check if the string ends with the specified substring if re.search(f"{re.escape(end)}$", text): print("String ends with the specified substring.") else: print("String does not end with the specified substring.") ... String starts with the specified substring. String ends with the specified substring. Another straightforward method to determine the start and end of a string is using the startswith() and endswith() methods.
GeeksforGeeks
geeksforgeeks.org › python › python-string-startswith
Python - String startswith() - GeeksforGeeks
April 29, 2025 - startswith() method in Python checks whether a given string starts with a specific prefix.
GoLinuxCloud
golinuxcloud.com › home › programming › python › python startswith()
Python startswith(): Check String Prefix, Ignore Case, and Tuple Examples
June 23, 2026 - Converting only the string but not the prefix for ignore-case checks. Passing a list instead of a tuple for multiple prefixes. Using in when the match must be at the beginning. Using startswith() when you need regex pattern matching.
Note.nkmk.me
note.nkmk.me › home › python
String Comparison in Python (Exact/Partial Match, etc.) | note.nkmk.me
April 29, 2025 - Modified: 2025-04-29 | Tags: Python, String, Regex · This article explains string comparisons in Python, covering topics such as exact matches, partial matches, forward/backward matches, and more. Contents · Exact match (equality comparison): ==, != Partial match: in, not in · Forward/backward match: startswith(), endswith() String order comparison: <, <=, >, >= Case-insensitive comparison: upper(), lower() Regex comparison: re.search(), re.fullmatch() re.search() re.fullmatch() re.IGNORECASE ·
Top answer 1 of 7
50
How about not using a regular expression at all?
if string.startswith("ftp://") and string.endswith(".jpg"):
Don't you think this reads nicer?
You can also support multiple options for start and end:
if (string.startswith(("ftp://", "http://")) and
string.endswith((".jpg", ".png"))):
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46
re.match will match the string at the beginning, in contrast to re.search:
re.match(r'(ftp|http)://.*\.(jpg|png)$', s)
Two things to note here:
r''is used for the string literal to make it trivial to have backslashes inside the regexstringis a standard module, so I chosesas a variable- If you use a regex more than once, you can use
r = re.compile(...)to built the state machine once and then user.match(s)afterwards to match the strings
If you want, you can also use the urlparse module to parse the URL for you (though you still need to extract the extension):
>>> allowed_schemes = ('http', 'ftp')
>>> allowed_exts = ('png', 'jpg')
>>> from urlparse import urlparse
>>> url = urlparse("ftp://www.somewhere.com/over/the/rainbow/image.jpg")
>>> url.scheme in allowed_schemes
True
>>> url.path.rsplit('.', 1)[1] in allowed_exts
True
HowToDoInJava
howtodoinjava.com › home › python string functions › python string startswith()
Python String startswith()
October 4, 2022 - Python string.startswith() checks the start of a string for specific text patterns e.g. URL schemes and so on. It returns True if a string starts with the specified prefix.
TutorialsPoint
tutorialspoint.com › How-to-check-if-string-or-a-substring-of-string-starts-with-substring-in-Python
Python String startswith() Method
The Python string method startswith() checks whether string starts with a given substring or not. This method accepts a prefix string that you want to search for and is invoked on a string object.
Top answer 1 of 2
9
The problem is that your pattern matches any string that comes after by test_ and before .py, but that doesn't restrict it from having other characters before the test_ or after the .py.
You need to use start (^) and end ($) anchors. Also, don't forget to escape the . character. Try this pattern:
(?<=^test_).+(?=\.py$)
2 of 2
2
Look at this:
import re
files = [
"test_1.py",
"Test.py",
"test.pyc",
"test.py",
"script.py"]
print [x for x in files if re.search("^test_.*py$", x)]
output:
['test_1.py']