Installing third party modules in Python

If we want to import a third-party module in Python and we get en error as below; we need to install that module first. Below example of error if a module is imported without installing it first.

>>> import untangle
Traceback (most recent call last):
File "<pyshell#0>", line 1, in <module>
import untangle
ModuleNotFoundError: No module named 'untangle'

To install the module:

1. Close the current session of IDLE.
2. Open command prompt and type “pip install untangle”

c:\Users\xyz>pip install untangle

Note: Sometimes, due to proxy servers in corporate Networks, step 2 fails with below error

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by ‘SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))’: /simple/untangle/

Could not fetch URL https://pypi.org/simple/untangle/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host=’pypi.org’, port=443): Max retries exceeded with url: /simple/untangle/ (Caused by SSLError(SSLCertVerificationError(1, ‘[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1056)’))) – skipping

ERROR: Could not find a version that satisfies the requirement untangle (from versions: none)

ERROR: No matching distribution found for untangle

To solve the SSL error, use below command

c:\Users\xyz>pip install --user --trusted-host=pypi.python.org --trusted-host=pypi.org --trusted-host=files.pythonhosted.org untangle

3. Open new session of IDLE and do the import again. It will be successful this time.