[英]How can i get the common elements in the first two list and save to a new list in python 3?
list1 = [input("Enter the values for the first list: ")]
list2 = [input("Enter the values for the second list: ")]
print(list1)
print(list2)
list3 = []
for element in list1:
if element in list2:
list3 = list2.append(element)
print(list3)
這是我嘗試過的。 但我得到一個空列表作為list3!
list1 = [input("Enter the values for the first list: ")]
list2 = [input("Enter the values for the second list: ")]
list1 和 list2 將是一個字符串列表。 因此你得到 list3 為空。 PFB 代碼和 o/p:
list1 = [input("Enter the values for the first list: ")]
list2 = [input("Enter the values for the second list: ")]
print(list1)
print(list2)
list3 = []
for element in list1:
print(type(element))
if element in list2:
list3.append(element)
print(list3)
output:
Enter the values for the first list: 1 2 3 4 5
Enter the values for the second list: 2 3 4 5 6
['1 2 3 4 5']
['2 3 4 5 6']
<class 'str'>
[]
添加正確的方法。 請參見下文,例如。 獲取 list1 和 list2:
# list1 = [input("Enter the values for the first list: ")]
# list2 = [input("Enter the values for the second list: ")]
list1 = [int(item) for item in input("Enter the 1st list items : ").split()]
list2 = [int(item) for item in input("Enter the 2nd list items : ").split()]
print('1st list: ',list1)
print('2nd list: ',list2)
list3 = []
for element in list1:
if element in list2:
list3.append(element)
print('common: ', list3)
output:
Enter the 1st list items : 1 2 3 4 5
Enter the 2nd list items : 3 4 5 6 7
1st list: [1, 2, 3, 4, 5]
2nd list: [3, 4, 5, 6, 7]
common: [3, 4, 5]
您不能使用[input('Enter numbers: ')]
來獲取列表的數字。 這將創建一個包含輸入字符串的列表。 您真正需要做的是首先輸入變量中的數字,比如說list1_inp
,然后使用nums = list1_inp.split(' ')
根據空格拆分list1_inp
。 現在您可以遍歷您的列表來檢查常見元素。
list1_inp = input('Enter the elements separated by spaces : ')
nums = list1_inp.split()
list2_inp = input('Enter the elements separated by spaces : ')
nums2 = list2_inp.split()
temp = nums2
final = []
for elem in nums:
if elem in temp:
final.append(elem)
temp.remove(elem)
print(final)
mylist1 = [1,2,3,4,5]
mylist2 = [2,3,4,5,6] # let these be the two lists
def func():
mylist3 = [] # This is the list where the common numbers append
for x in mylist1:
for y in mylist2:
if x==y:
mylist3.append(x)
else:
pass
return mylist3
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