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.
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:
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# 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]]
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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:
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# 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]]
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Output:
The original list is : [‘434’, ‘823’, ’98’, ’74’]
Are all strings digits ? : True
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: NoThere 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.
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# 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]
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Output:
Equal
But In Python, we can do the same task in much interesting ways.
Method #2: Using all[] method
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# 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]
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Output:
Equal
Method #3: Using count[] method
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# 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]
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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.
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# 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"]
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Output:
EqualPython - Check if all elements in a List are same
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.