.copy() python code example

Example 1: python copy file

from shutil import copyfile
copyfile(src, dst)

Example 2: python clone object

import copy

new_ob = copy.deepcopy(old_ob)

Example 3: copy a list python

new_list = old_list.copy()
# or
new_list = old_list[:]

Example 4: python copy list

# Performance analysis by River on Stack Overflow
METHOD                  TIME TAKEN
b = [*a]                2.75180600000021
b = a * 1               3.50215399999990
b = a[:]                3.78278899999986  # Python2 winner
b = a.copy()            4.20556500000020
b = []; b.extend(a)     4.68069800000012
b = a[0:len(a)]         6.84498999999959
*b, = a                 7.54031799999984
b = list(a)             7.75815899999997
b = [i for i in a]      18.4886440000000
b = copy.copy(a)        18.8254879999999  # With `import copy`
b = []
for item in a:
    b.append(item)      35.4729199999997
  
# NOTE: Only for shallow copies, use copy.deepcopy for nested lists

Example 5: .copy python

new_list = list.copy()

# returns a new list without modifying the orginal list.

Example 6: python copy set

s1 = set()
s2 = s1.copy()