#PYTHON FIND WORD IN FILE 2.7 CODE#
It returns 0 if the string is found and -1 if the string is not found.Īn example code is given below. The find method is passed the required string. Use find Method to Search a String in a File in PythonĪ simple find method can be used with the read() method to find the string in the file. Then we can use the in operator to check whether the string is in the returned string.Īn example code is given below: file = open("temp.txt", "w") The file read() method returns the content of the file as a whole string. Use the File read() Method to Search a String in a File in Python Return False # The string does not exist in the file Output: The original string is: This dress looks good you have good taste in clothes.Windows search text in files and folders with Notepad++ file = open("temp.txt", "w") Print("The start indices of the substrings are : " + str(result)) Print("The substring to find: " + substr) The following code uses the re.finditer() function to find all occurrences of a substring in a string. In this case, the pattern refers to the substring. Re.finditer() uses the pattern and string parameter in its syntax. To use this function, we need to import the regex library re first. It helps in performing the task of finding the occurrence of a particular pattern in a string. Re.finditer() is a function of the regex library that Python provides for programmers to use in their code. Use the re.finditer() to Find All Occurrences of a Substring in a String in Python The start indices of the substrings are : Output: The original string is : This dress looks good you have good taste in clothes. Print("The start indices of the substrings are : " + str(res))
# using list comprehension + startswith()
Print("The substring to find : " + substr) Print("The original string is : " + str1) The following code uses list comprehension and startswith() to find all occurrences of a substring in a string. The startswith() function plays out the task of getting the beginning indices of the substring, and list comprehension is utilized to iterate through the complete target string. This method needs two things: list comprehension and the startswith() method. Use List Comprehension and startswith() to Find All Occurrences of a Substring in a String in Python The only downfall of this method is that it does not return the different indices at which the substring occurs in the string. It is an easy method and works in every case. #occurrence of word 'good' from index 0 to 25 #occurrence of word 'good' in whole string Str1 = "This dress looks good you have good taste in clothes." The following code uses the unt() function to find all occurrences of a substring in a string. The count() method traverses the string and returns the number of times a specific substring has occurred in the string. Moreover, it has additional parameters start and end to specify the indices of starting and ending positions. The unt() is an in-built function in Python that returns the quantity or number of occurrences of a substring in a given particular string.
Use the unt() Function to Find All Occurrences of a Substring in a String in Python This tutorial will discuss different methods to find all occurrences of a substring within a string in Python. One such problem is finding all the occurrences of a substring within a particular string. Dealing with substrings can often be troublesome. Use the re.finditer() to Find All Occurrences of a Substring in a String in PythonĪ substring in Python is a cluster of characters that occurs within another string.Use List Comprehension and startswith() to Find All Occurrences of a Substring in a String in Python.Use the unt() Function to Find All Occurrences of a Substring in a String in Python.