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To create a directory, use the os.mkdir() method provided by the os standard library module:
import os
dirname = '/Users/flavio/test'
os.mkdir(dirname)
Creating a folder can raise an OSError exception, for example if the disk is full or the directory already exists, so we use a try block to catch it and gracefully handle the problem by printing an error message:
import os
dirname = '/Users/flavio/test'
try:
os.mkdir(dirname)
except OSError:
print('Failed creating the directory')
else:
print('Directory created')