/Python/Python list add first

Python list add first

How to add element at first position in array python

array.insert(index, value)

x = [1,3,4]
a = 2
x.insert(1,a)

print(x)

#Will print: [1,2,3,4]

3

Python append to first index

In [1]: ls = [1,2,3]

In [2]: ls.insert(0, "new")

In [3]: ls
Out[3]: ['new', 1, 2, 3]

2

Source: stackoverflow.com

Python list add first

# list.insert(before, value)
list = ["a", "b"]
list.insert(0, "c")
print(list)     # ['c', 'a', 'b']

1

Similar codes

35 votes324 views5 answers
Sort by dataframe
Python
0 vote330 views1 answer
Items of a list not in another list python
Python
0 vote315 views1 answer
Use module Crypto.Cipher.PKCS1_OAEP instead
Python
0 vote298 views1 answer
Install reportlab python
Python
0 vote392 views1 answer
Precedence in python
Python
0 vote333 views1 answer
Writerows to existing csv python
Python
10 votes305 views1 answer
Pandas select columns where value is true
Python
7 votes286 views2 answers
Python prime check
Python
4 votes303 views4 answers
Jupyter lab autocomplete
Python
-1 vote322 views1 answer
Return an RDD with the keys of each tuple.
Python

Share