how to check if a number is in a list python?

In this “list contains python” best post i learn to about different methods to check if a given ProductId exists in list or not using Python.

How to Check if an item exists in list ?

here I give you best example for Fastest way to check if a value exists in a list using Python.

Suppose you mean python “list” contains python where you say “array”, you can do

if item in my_list:
    # whatever

python if in list,list contains python,python array contains,python list contains string,check if element in list python,iterate through list python,python find index of item in list,python check for duplicates in list,check if something is in a list python,how to check if something is in a list python,loop through list python
python list contains

Check if object with specific value exists in List

if(productListFirst.Any(a => a.Id == stringID))
{
	//Your some Python logic goes here;
}

Also Read: python list contains

Python Check If List Item Exists

use the in keyword:
here in this example to Check if “pakainfo” is Existing in the list contains python:

thislist = ["pakainfo", "4cgandhi", "infinityknow"]
if "pakainfo" in thislist:
  print("Yes, 'pakainfo' is in the Website list")

Also Read: Linear Search in C, C++, JAVA, PHP, Python3 and C#

Read Also:  Uninstall Remove Python3 from Windows, Linux (Ubuntu) and Mac

With any Example

productListFirst = [[-9, -1, 3], [11, -8],[-4,434,0]]
search_ProductId = -8

# Given list
print("Given List :\n", productListFirst)

print("ProductId to Find: ",search_ProductId)

# Using in
if any(search_ProductId in sublist for sublist in productListFirst):
   print("Existing")
else:
   print("Not Existing")

Output

('Given List :\n', [[-9, -1, 3], [11, -8], [-4, 434, 0]])
('ProductId to Find: ', -8)
Existing

Also Read: convert string to array python

Also Read: Shell Script to Add Two Numbers using ommand line arguments

With in Example

productListFirst = [[-9, -1, 3], [11, -8],[-4,434,0]]
search_ProductId = -8

# Given list
print("Given List :\n", productListFirst)

print("ProductId to Find: ",search_ProductId)

# Using in
if search_ProductId in (item for sublist in productListFirst for item in sublist):
   print("Existing")
else:
   print("Not Existing")

search_ProductId = 13
print("New ProductId to Find: ",search_ProductId)

# Using in
if search_ProductId in (item for sublist in productListFirst for item in sublist):
   print("Existing")
else:
   print("Not Existing")

Output

Given List :
[[-9, -1, 3], [11, -8], [-4, 434, 0]]
ProductId to Find: -8
Existing
New ProductId to Find: 13
Not Existing

Also Read: how to split a string in python? | python split string into list

Read Also:  How to uninstall Python?

Also Read: how to skip a line in python | python skip lines starting with #

With chain Example

from itertools import chain

productListFirst = [[-9, -1, 3], [11, -8],[-4,434,0]]
search_ProductId = -8

# Given list
print("Given List :\n", productListFirst)

print("ProductId to Find: ",search_ProductId)

# Using in
if search_ProductId in chain(*productListFirst):
   print("Existing")
else:
   print("Not Existing")

search_ProductId = 13
print("New ProductId to Find: ",search_ProductId)

# Using in
if search_ProductId in chain(*productListFirst):
   print("Existing")
else:
   print("Not Existing")

Output

Given List :
[[-9, -1, 3], [11, -8], [-4, 434, 0]]
ProductId to Find: -8
Existing
New ProductId to Find: 13
Not Existing

Also Read: python developer resume Examples

Also Read: How to Use Time Sleep in Python Script?

Read Also:  How to create an empty DataFrame with column names in Python?

Also Read: python unzip

Also Read: Python Array Contains: How To Check If Item Exists In Array?

Also Read: How to create a Directory in python ?