How to get the code of a module without importing the module? - module

Question

I want to create a file that copies all the code from each module and pastes it into a new file. Here's what I have so far:
from stdlib_list import stdlib_list
import inspect as getcode
libs = stdlib_list("3.8")
for i in range(len(libs)):
system(f"import {libs[i]}")
f = open(f"{libs[i]}_module.py", "w+")
code = getcode.getsource(libs[i])
f.write(code)
f.close()
But I get this error:
sh: import: command not found
Traceback (most recent call last):
File "/Users/pengguest/get_mouldule_code.py", line 8, in <module>
code = getcode.getsource(libs[i])
File "/Users/pengli/opt/anaconda3/lib/python3.8/inspect.py", line 985, in getsource
lines, lnum = getsourcelines(object)
File "/Users/pengli/opt/anaconda3/lib/python3.8/inspect.py", line 967, in getsourcelines
lines, lnum = findsource(object)
File "/Users/pengli/opt/anaconda3/lib/python3.8/inspect.py", line 780, in findsource
file = getsourcefile(object)
File "/Users/pengli/opt/anaconda3/lib/python3.8/inspect.py", line 696, in getsourcefile
filename = getfile(object)
File "/Users/pengli/opt/anaconda3/lib/python3.8/inspect.py", line 676, in getfile
raise TypeError('module, class, method, function, traceback, frame, or '
TypeError: module, class, method, function, traceback, frame, or code object was expected, got str
[Finished in 0.6s with exit code 1]
[shell_cmd: python -u "/Users/pengguest/get_mouldule_code.py"]
[dir: /Users/pengguest]
[path: /usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin]
Can anyone help? Thanks.