check if element are same using all()
Let’s convert the list to Iterable and check if each entry of iterable is equal to first element of list using all() i.e.
'''
check if element are same using all()
It will Iterate through all the elements in list and check if all elements are similar to first element or not.
'''
result = False;
if len(listOfStrings) > 0 :
result = all(elem == listOfStrings[0] for elem in listOfStrings)
if result :
print("All Elements in List are Equal")
else:
print("All Elements in List are Not Equal")
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Python Program to check whether all elements in a string list are numeric
Given a list that contains only string elements the task here is to write a Python program to check if all of them are numeric or not. If all are numeric return True otherwise, return False.
Input : test_list = [“434”, “823”, “98”, “74”]
Output : True
Explanation : All Strings are digits.
Input : test_list = [“434”, “82e”, “98”, “74”]
Output : False
Explanation : e is not digit, hence verdict is False.
Method 1 : Using all(), isdigit() and generator expression
In this, we check for number from isdigit(). all() is used to check for all strings to be number, iteration for each string is done using generator expression.
Example:
Python3
# initializing list
test_list = ["434", "823", "98", "74"]
# printing original list
print("The original list is : " + str(test_list))
# checking all elements to be numeric using isdigit()
res = all(ele.isdigit() for ele in test_list)
# printing result
print("Are all strings digits ? : " + str(res))
|
Output:
The original list is : [‘434’, ‘823’, ’98’, ’74’]
Are all strings digits ? : True
Method 2 : Using all(), isdigit() and map()
In this, we extend test logic to each string using map(), rather than generator expression. Rest all the functionalities are performed similar to above method.
Example:
Python3
# initializing list
test_list = ["434", "823", "98", "74"]
# printing original list
print("The original list is : " + str(test_list))
# checking all elements to be numeric using isdigit()
# map() to extend to each element
res = all(map(str.isdigit, test_list))
# printing result
print("Are all strings digits ? : " + str(res))
|
Output:
The original list is : [‘434’, ‘823’, ’98’, ’74’]
Are all strings digits ? : True
Article Tags :
Python
Python Programs
Python list-programs
Python string-programs
Python | Check if all elements in a List are same
Given a list, write a Python program to check if all the elements in given list are same.
Example:
Input: ['Geeks', 'Geeks', 'Geeks', 'Geeks', ]
Output: Yes
Input: ['Geeks', 'Is', 'all', 'Same', ]
Output: No
There are various ways we can do this task. Let’s see different ways we can check if all elements in a List are same.
Method #1: Comparing each element.
# Python program to check if all
# ments in a List are same
def ckeckList(lst):
ele = lst[0]
chk = True
# Comparing each element with first item
for item in lst:
if ele != item:
chk = False
break;
if (chk == True): print("Equal")
else: print("Not equal")
# Driver Code
lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks', ]
ckeckList(lst)
|
Output:
Equal
But In Python, we can do the same task in much interesting ways.
Method #2: Using all() method
# Python program to check if all
# elements in a List are same
res = False
def chkList(lst):
if len(lst) < 0 :
res = True
res = all(ele == lst[0] for ele in lst)
if(res):
print("Equal")
else:
print("Not equal")
# Driver Code
lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks']
chkList(lst)
|
Output:
Equal
Method #3: Using count() method
# Python program to check if all
# elements in a List are same
res = False
def chkList(lst):
if len(lst) < 0 :
res = True
res = lst.count(lst[0]) == len(lst)
if(res):
print("Equal")
else:
print("Not equal")
# Driver Code
lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks']
chkList(lst)
|
Output:
Equal
Method #4: Using set data structure
Since we know there cannot be duplicate elements in a set, we can use this property to check whether all the elements are same or not.
# Python program to check if all
# elements in a List are same
def chkList(lst):
return len(set(lst)) == 1
# Driver Code
lst = ['Geeks', 'Geeks', 'Geeks', 'Geeks']
if chkList(lst) == True: print("Equal")
else: print("Not Equal")
|
Output:
Equal
Article Tags :
Python
Python Programs
Python list-programs
python-list
Practice Tags : python-list
Python - Check if all elements in a List are same
PythonServer Side ProgrammingProgramming
Sometimes we come across the need to check if we have one single value repeated in a list as list elements. We can check for such scenario using the below python programs. There are different approaches.
Check if all elements in a List are same
In this article, we will learn to check that all elements in a list are the same or not in Python. We will use some built-in functions, simple algorithms, and some custom code as well to better understand the problem. Let's first have a quick look over what is a list in Python.
