/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

0 vote178 views1 answer
Most valuable features in pandas model
Python
11 votes193 views2 answers
Use regex python without re
Python
2 votes192 views1 answer
Blank=true
Python
28 votes193 views2 answers
Python print without new lines
Python
1 vote188 views1 answer
Python see if a number is greater than other
Python
0 vote188 views1 answer
Check processing bar of loop in python
Python
0 vote176 views1 answer
Np.argmax python could not be evaluated
Python
0 vote198 views1 answer
Exercise of python loops
Python
0 vote241 views1 answer
Python create unreadable save file
Python
28 votes199 views5 answers
String slicing in python
Python

Share