Databases
StackOverflow2013
Postsdbo
POgetopt() not enforcing required arguments?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POgetopt() not enforcing required arguments?
    primarykey
    data
    text
    <p>I'm having problems with this <code>getopt()</code> code in a script that I'm writing which does some simple file manipulation given 2 required parameters (input filename and output filename) and/or 2 optional/situational arguments (debug or help).</p> <p>Code is:</p> <pre><code>def main(argv): try: opts, args = getopt.getopt(argv, "i:o:dh", ["input-file=", "output-file=", "debug", "help"]) except getopt.GetoptError: usage() sys.exit(2) for opt, arg in opts: if opt in ("-h", "--help"): usage() sys.exit() elif opt in ("-d", "--debug"): global _debug _debug = 1 elif opt in ("-i", "--input-file"): u_input_file_name = arg elif opt in ("-o", "--output-file"): u_output_file_name = arg </code></pre> <p>According to the <code>getopt()</code> documentation:</p> <blockquote> <p>options that require an argument followed by a colon ('<code>:</code>'; i.e., the same format that Unix getopt() uses).</p> </blockquote> <p>The problem is that as I understand it, the variables/args followed by a <code>:</code> should be enforced as required ... but the options <code>i</code> and <code>o</code> are not being enforced. Running this snippet garners an error about <code>u_input_file_name</code> being referenced before being assigned:</p> <pre><code>[tdelane@fbsd81-1 ~/python]$ ./inco_add_cm_mpscli.py -o google Traceback (most recent call last): File "./inco_add_cm_mpscli.py", line 57, in &lt;module&gt; main(sys.argv[1:]) File "./inco_add_cm_mpscli.py", line 25, in main infile = open(u_input_file_name, 'r') UnboundLocalError: local variable 'u_input_file_name' referenced before assignment </code></pre> <p>What am I doing wrong?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USTyler D
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POgetopt() not enforcing required arguments?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POgetopt() not enforcing required arguments?
      1. This table or related slice is empty.
      1. VTUpMod
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload