enumerate(items, start=1)

Use the start argument to control the start index of the enumeration change from 0 index to 1 index

items = ['a', 'b', 'c']
for index, item in enumerate(items, 1):
    print(index, item)

1 a
2 b
3 c

error: externally-managed-environment

python -m venv myenv
source myenv/bin/activate

note:

use myenv/bin/{executable} (e.g. myenv/bin/pip)

don’t change the folder path after creating the virtual env

Conda

conda create --name myenv python=3.X
conda activate myenv
conda env list

zip(*[…])

• auto crop to the length of the shortest list

use zip as sliding window

for first, second, third in zip(string, string[1:], string[2:]): print(first + second + third)