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numpy append list to 2d array

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orci answered on May 16, 2020 Popularity 9/10 Helpfulness 4/10

answer numpy append list to 2d array

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numpy append list to 2d array

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a = np.array([[1,2,3]])

l = [4,5,6]

np.vstack([a,l])
Out: array([[1, 2, 3],
       		[4, 5, 6]])

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Tags: 2d append list numpy python

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Contributed on Jul 31 2022

orci

0 Answers Avg Quality 2/10

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python append to 2d array

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temp_list = [[], [], [], []]
temp_list[0].append("a1")
temp_list[1].append("a2")
temp_list[2].append("a3")
temp_list[3].append("a4")

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Tags: 2d 2

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Contributed on May 16 2020

Kodi4444

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python 2d array append

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arr = []
arr.append([])
arr[0].append('aa1')
arr[0].append('aa2')

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Tags: 2d 2

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Contributed on Feb 19 2021

Ninja Cat Coder

0 Answers Avg Quality 2/10

python append to 2d array

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"""0 shows no error , 1 shows error"""
error_list=[]   #main error list
p=0  #p - phone field
e=1  #e - mail field
d=1  #d - date field
temp_error=[]  #temporary error list created and to collect data everytime
if(p==1):
    temp_error.append('invalid number')
if(e==1):
    temp_error.append('invalid email')
if(d==1):
    temp_error.append('invalid admit date')
error_list.append(temp_error) 

#second call (you can call it recursively too by calling function name)
p=1  #p - phone field
e=0  #e - mail field
d=1  #d - date field
temp_error=[]
if(p==1):
    temp_error.append('invalid number')
if(e==1):
    temp_error.append('invalid email')
if(d==1):
    temp_error.append('invalid admit date')
error_list.append(temp_error)
print(error_list)

#OUTPUT : [['invalid email','invalid admit date'],['invalid number','invalid admit date']]

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Tags: 2d append python

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Contributed on May 19 2022

AMAN OJHA

0 Answers Avg Quality 2/10

numpy append list to 2d array

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