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PONavigate between modules in Python
 

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    <p>I'm trying to navigate between modules in Python but I can't return to main menu. This is the arch: <code>main.py</code> calls <code>opa.py</code> and <code>opb.py</code></p> <p>main.py:</p> <pre><code>import sys, opa, opb def menu(): print '1. Go opA' print '2. Go opB' print '3. Exit' pick = raw_input('Pick one: ') if pick == '1': opa.menu() elif pick == '2': opb.menu() else: sys.exit() menu() </code></pre> <p>opa.py:</p> <pre><code>def menu(): print '1. Speak' print '2. Return' pick = raw_input('Pick one: ') if pick == '1': print 'OpA' elif pick == '2': main.menu() </code></pre> <p>opb.py:</p> <pre><code>def menu(): print '1. Speak' print '2. Return' pick = raw_input('Pick one: ') if pick == '1': print 'OpB' elif pick == '2': main.menu() </code></pre> <p>When I pick 2 in <code>opa.py</code> and <code>opb.py</code> the program breaks with this error [in this case I go onto opa.py and select "2. Return"]:</p> <pre><code>Traceback (most recent call last): File "main.py", line 16, in &lt;module&gt; menu() File "main.py", line 10, in menu opa.menu() File "opa.py", line 8, in menu main.menu() NameError: global name 'main' is not defined </code></pre> <p>If I add <code>from main import menu</code> I get this other one:</p> <pre><code>Traceback (most recent call last): File "main.py", line 1, in &lt;module&gt; import sys, opa, opb File "opa.py", line 1, in &lt;module&gt; from main import menu File "main.py", line 16, in &lt;module&gt; menu() File "main.py", line 10, in menu opa.menu() AttributeError: 'module' object has no attribute 'menu' </code></pre> <p>And I get it before loading opa.py or opb.py</p> <p>Any suggestions?</p> <p><strong>SOLUTION</strong>: The arch was wrong, so I put the imports after the imports. Like that:</p> <pre><code>def menu(): print '1. Go opA' print '2. Go opB' print '3. Exit' pick = raw_input('Pick one: ') if pick == '1': import opa opa.menu() elif pick == '2': import opb opb.menu() else: import sys sys.exit() menu() </code></pre>
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    1. COAdd `import main` in `opb.py` and `opa.py`
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    2. COalso please double check your indentation before submitting...I have corrected it
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    3. COI've got new errors. I edited the topic.
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