In this last example, we will use the index() method to get the search string in the list:try: my_list.index(search_string) print(True) except ValueError: print(False) # TrueThis example attempts to find the in
The target element variable, the indexes of whose matching elements we will find, is defined below: target_element=2 Example 1: Determine Index of All Matching Elements in List Using for Loop & enumerate() Function In this first example, we will use afor loopalong with theenumerate() functi...
python find函数始终提供-1 Python的find函数是用于在字符串中查找子字符串的方法。它返回子字符串在字符串中第一次出现的索引位置,如果没有找到则返回-1。 该函数的语法如下: 代码语言:txt 复制 str.find(sub, start, end) 其中,str是要进行查找的字符串,sub是要查找的子字符串,start和end是可选参数,用于指...
1) Using index() Method Theindex()method is used to find the index value of the specific element. Syntax: list_name.index(item) It will print the index value of an item from thelist_name. Example 1: # listlist=["Gwalior","Bhopal","Indore","Noida","Delhi","Ajmer"]# Now, using...
Finding the index of an item in a list: In this tutorial, we will learn how to find the index of a given item in a Python list. Learn with the help of examples.
Python List Index Finding With theforLoop Method To find the index of an element in the list in Python, we can also use theforloop method. The code is: consonants=["b","f","g","h","j","k"]check="j"position=-1foriinrange(len(consonants)):ifconsonants[i]==check:position=ibre...
Book index-2 Recommended Tutorial:Python Finding Things — Ultimate Guide for Python Lists Find The Index when List has Duplicate elements Theindex()method is used to find the first lowest index of the element, i.e. in case of duplicate elements it will return the first element’s index as...
print(find_Index("Python Exercises", "yt")) print(find_Index("Python Exercises", "PY")) Sample Output: 7 1 Not found Flowchart: For more Practice: Solve these Related Problems: Write a Python program to find the starting index of a given substring in a string and return "Not found" ...
Import Python library re. Use the in keyword to test if input string contains the supplied character. Use re.finditer() to create a new list of all matches of the character in string. Use the for loop to iterate over every element of the new list. Inside the for loop, use element.sta...
Python code to find index where elements change value NumPy# Import numpy import numpy as np # Creating a numpy array arr = [1, 1, 1, 1, 1, 2, 2, 2, 3, 4, 3, 4, 3, 4, 3, 4, 5, 5, 5] # Display original array print("Original Array:\n",arr,"\n") # Finding the ...