title: Search if filename with matching 4 digits exists in a directory
body: <p>I am checking if filename - 'Dev Finance GRM CONS ASPAC_Sales_3069_WI2_2020_GrsSalesAdj_Manual Upload Planning_1000records.csv' exists in a path</p>
  <p>I am generating multiple files in the same path with similar name, but a unique pin ('3069') in the above case. This '3069' is stored in a unique variable 'upload_pin'</p>
  <p>upload_pin = 3069 (and I want to search if a .csv file including this upload_pin exists in my path)</p>
  <p>Tried this:</p>
  <pre class="lang-py prettyprint-override"><code>path = r&quot;\\OPCITSNAPADCON2.jnj.com\tm1\cons\grm_aspac\user_in\Manual Upload Current Plan\Archive&quot;
  csv_files = glob.glob(os.path(path + '/*.csv'))
  for filename in csv_files:
      if upload_pin in filename:
                 print(filename)
  </code></pre>