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python-cheatsheet
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Exceptions

pull/140/head
Jure Šorn 2 years ago
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2 changed files with 8 additions and 6 deletions
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  1. 5
      README.md
  2. 9
      index.html

5
README.md
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@ -1392,6 +1392,7 @@ finally:
``` ```
* **Code inside the `'else'` block will only be executed if `'try'` block had no exceptions.** * **Code inside the `'else'` block will only be executed if `'try'` block had no exceptions.**
* **Code inside the `'finally'` block will always be executed (unless a signal is received).** * **Code inside the `'finally'` block will always be executed (unless a signal is received).**
* **All variables that are initialized in executed blocks are also visible in all subsequent blocks, as well as outside the try/except clause (only function blocks delimit scope).**
### Catching Exceptions ### Catching Exceptions
```python ```python
@ -1414,7 +1415,7 @@ raise <exception>(<el> [, ...])
#### Re-raising caught exception: #### Re-raising caught exception:
```python ```python
except <exception> as <name>:
except <exception> [as <name>]:
... ...
raise raise
``` ```
@ -1426,7 +1427,7 @@ exc_type = <name>.__class__
filename = <name>.__traceback__.tb_frame.f_code.co_filename filename = <name>.__traceback__.tb_frame.f_code.co_filename
func_name = <name>.__traceback__.tb_frame.f_code.co_name func_name = <name>.__traceback__.tb_frame.f_code.co_name
line = linecache.getline(filename, <name>.__traceback__.tb_lineno) line = linecache.getline(filename, <name>.__traceback__.tb_lineno)
traceback = ''.join(traceback.format_tb(<name>.__traceback__))
trace_str = ''.join(traceback.format_tb(<name>.__traceback__))
error_msg = ''.join(traceback.format_exception(exc_type, <name>, <name>.__traceback__)) error_msg = ''.join(traceback.format_exception(exc_type, <name>, <name>.__traceback__))
``` ```

9
index.html
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@ -54,7 +54,7 @@
<body> <body>
<header> <header>
<aside>December 16, 2022</aside>
<aside>December 19, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a> <a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header> </header>
@ -1194,6 +1194,7 @@ LogicOp = Enum(<span class="hljs-string">'LogicOp'</span>, {<span class="hljs-st
<ul> <ul>
<li><strong>Code inside the <code class="python hljs"><span class="hljs-string">'else'</span></code> block will only be executed if <code class="python hljs"><span class="hljs-string">'try'</span></code> block had no exceptions.</strong></li> <li><strong>Code inside the <code class="python hljs"><span class="hljs-string">'else'</span></code> block will only be executed if <code class="python hljs"><span class="hljs-string">'try'</span></code> block had no exceptions.</strong></li>
<li><strong>Code inside the <code class="python hljs"><span class="hljs-string">'finally'</span></code> block will always be executed (unless a signal is received).</strong></li> <li><strong>Code inside the <code class="python hljs"><span class="hljs-string">'finally'</span></code> block will always be executed (unless a signal is received).</strong></li>
<li><strong>All variables that are initialized in executed blocks are also visible in all subsequent blocks, as well as outside the try/except clause (only function blocks delimit scope).</strong></li>
</ul> </ul>
<div><h3 id="catchingexceptions">Catching Exceptions</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">except</span> &lt;exception&gt;: ... <div><h3 id="catchingexceptions">Catching Exceptions</h3><pre><code class="python language-python hljs"><span class="hljs-keyword">except</span> &lt;exception&gt;: ...
<span class="hljs-keyword">except</span> &lt;exception&gt; <span class="hljs-keyword">as</span> &lt;name&gt;: ... <span class="hljs-keyword">except</span> &lt;exception&gt; <span class="hljs-keyword">as</span> &lt;name&gt;: ...
@ -1212,7 +1213,7 @@ LogicOp = Enum(<span class="hljs-string">'LogicOp'</span>, {<span class="hljs-st
<span class="hljs-keyword">raise</span> &lt;exception&gt;(&lt;el&gt; [, ...]) <span class="hljs-keyword">raise</span> &lt;exception&gt;(&lt;el&gt; [, ...])
</code></pre></div> </code></pre></div>
<div><h4 id="reraisingcaughtexception">Re-raising caught exception:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">except</span> &lt;exception&gt; <span class="hljs-keyword">as</span> &lt;name&gt;:
<div><h4 id="reraisingcaughtexception">Re-raising caught exception:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">except</span> &lt;exception&gt; [<span class="hljs-keyword">as</span> &lt;name&gt;]:
... ...
<span class="hljs-keyword">raise</span> <span class="hljs-keyword">raise</span>
</code></pre></div> </code></pre></div>
@ -1222,7 +1223,7 @@ exc_type = &lt;name&gt;.__class__
filename = &lt;name&gt;.__traceback__.tb_frame.f_code.co_filename filename = &lt;name&gt;.__traceback__.tb_frame.f_code.co_filename
func_name = &lt;name&gt;.__traceback__.tb_frame.f_code.co_name func_name = &lt;name&gt;.__traceback__.tb_frame.f_code.co_name
line = linecache.getline(filename, &lt;name&gt;.__traceback__.tb_lineno) line = linecache.getline(filename, &lt;name&gt;.__traceback__.tb_lineno)
traceback = <span class="hljs-string">''</span>.join(traceback.format_tb(&lt;name&gt;.__traceback__))
trace_str = <span class="hljs-string">''</span>.join(traceback.format_tb(&lt;name&gt;.__traceback__))
error_msg = <span class="hljs-string">''</span>.join(traceback.format_exception(exc_type, &lt;name&gt;, &lt;name&gt;.__traceback__)) error_msg = <span class="hljs-string">''</span>.join(traceback.format_exception(exc_type, &lt;name&gt;, &lt;name&gt;.__traceback__))
</code></pre></div> </code></pre></div>
@ -2908,7 +2909,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<footer> <footer>
<aside>December 16, 2022</aside>
<aside>December 19, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a> <a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer> </footer>

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