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python-cheatsheet
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Tuple, Curses, Appendix

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Jure Šorn 4 years ago
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2 changed files with 45 additions and 45 deletions
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  1. 46
      README.md
  2. 44
      index.html

46
README.md
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@ -144,8 +144,8 @@ Tuple
**Tuple is an immutable and hashable list.**
```python
<tuple> = ()
<tuple> = (<el>,)
<tuple> = (<el_1>, <el_2> [, ...])
<tuple> = (<el>,) # Or: <el>,
<tuple> = (<el_1>, <el_2> [, ...]) # Or: <el_1>, <el_2> [, ...]
```
### Named Tuple
@ -2370,30 +2370,30 @@ with open('test.csv', encoding='utf-8', newline='') as file:
Curses
------
#### Clears the terminal, prints a message and waits for the ESC key press:
#### Runs a basic file explorer in the terminal:
```python
from curses import wrapper, curs_set, ascii
from curses import KEY_UP, KEY_RIGHT, KEY_DOWN, KEY_LEFT
from curses import wrapper, ascii, A_REVERSE, KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_ENTER
from os import listdir, chdir, path
def main():
wrapper(draw)
def draw(screen):
curs_set(0) # Makes cursor invisible.
screen.nodelay(True) # Makes getch() non-blocking.
screen.clear()
screen.addstr(0, 0, 'Press ESC to quit.') # Coordinates are y, x.
while screen.getch() != ascii.ESC:
pass
def get_border(screen):
from collections import namedtuple
P = namedtuple('P', 'x y')
height, width = screen.getmaxyx()
return P(width-1, height-1)
def main(screen):
ch, first, selected, paths = 0, 0, 0, listdir()
while ch != ascii.ESC:
height, _ = screen.getmaxyx()
screen.clear()
for y, path_ in enumerate(paths[first : first+height]):
screen.addstr(y, 0, path_, A_REVERSE * (selected == first + y))
ch = screen.getch()
selected += (ch == KEY_DOWN) - (ch == KEY_UP)
selected = max(0, min(len(paths)-1, selected))
first += (first <= selected - height) - (first > selected)
if ch in [KEY_LEFT, KEY_RIGHT, KEY_ENTER, 10, 13]:
new_dir = '..' if ch == KEY_LEFT else paths[selected]
if path.isdir(new_dir):
chdir(new_dir)
first, selected, paths = 0, 0, listdir()
if __name__ == '__main__':
main()
wrapper(main)
```
@ -3489,7 +3489,7 @@ from sys import argv, exit
from collections import defaultdict, namedtuple
from dataclasses import make_dataclass
from enum import Enum
import re, operator as op, itertools as it, functools as ft
import functools as ft, itertools as it, operator as op, re
def main():

44
index.html
View File

@ -335,8 +335,8 @@ Counter({<span class="hljs-string">'blue'</span>: <span class="hljs-number">3</s
<div><h2 id="tuple"><a href="#tuple" name="tuple">#</a>Tuple</h2><p><strong>Tuple is an immutable and hashable list.</strong></p><pre><code class="python language-python hljs">&lt;tuple&gt; = ()
&lt;tuple&gt; = (&lt;el&gt;,)
&lt;tuple&gt; = (&lt;el_1&gt;, &lt;el_2&gt; [, ...])
&lt;tuple&gt; = (&lt;el&gt;,) <span class="hljs-comment"># Or: &lt;el&gt;,</span>
&lt;tuple&gt; = (&lt;el_1&gt;, &lt;el_2&gt; [, ...]) <span class="hljs-comment"># Or: &lt;el_1&gt;, &lt;el_2&gt; [, ...]</span>
</code></pre></div>
@ -2078,28 +2078,28 @@ plt.clf() <span class="hljs-comment"># Clea
</code></pre></div></div>
<div><h2 id="curses"><a href="#curses" name="curses">#</a>Curses</h2><div><h4 id="clearstheterminalprintsamessageandwaitsfortheesckeypress">Clears the terminal, prints a message and waits for the ESC key press:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> curses <span class="hljs-keyword">import</span> wrapper, curs_set, ascii
<span class="hljs-keyword">from</span> curses <span class="hljs-keyword">import</span> KEY_UP, KEY_RIGHT, KEY_DOWN, KEY_LEFT
<div><h2 id="curses"><a href="#curses" name="curses">#</a>Curses</h2><div><h4 id="runsabasicfileexplorerintheterminal">Runs a basic file explorer in the terminal:</h4><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> curses <span class="hljs-keyword">import</span> wrapper, ascii, A_REVERSE, KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_ENTER
<span class="hljs-keyword">from</span> os <span class="hljs-keyword">import</span> listdir, chdir, path
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main</span><span class="hljs-params">()</span>:</span>
wrapper(draw)
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">draw</span><span class="hljs-params">(screen)</span>:</span>
curs_set(<span class="hljs-number">0</span>) <span class="hljs-comment"># Makes cursor invisible.</span>
screen.nodelay(<span class="hljs-keyword">True</span>) <span class="hljs-comment"># Makes getch() non-blocking.</span>
screen.clear()
screen.addstr(<span class="hljs-number">0</span>, <span class="hljs-number">0</span>, <span class="hljs-string">'Press ESC to quit.'</span>) <span class="hljs-comment"># Coordinates are y, x.</span>
<span class="hljs-keyword">while</span> screen.getch() != ascii.ESC:
<span class="hljs-keyword">pass</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">get_border</span><span class="hljs-params">(screen)</span>:</span>
<span class="hljs-keyword">from</span> collections <span class="hljs-keyword">import</span> namedtuple
P = namedtuple(<span class="hljs-string">'P'</span>, <span class="hljs-string">'x y'</span>)
height, width = screen.getmaxyx()
<span class="hljs-keyword">return</span> P(width<span class="hljs-number">-1</span>, height<span class="hljs-number">-1</span>)
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main</span><span class="hljs-params">(screen)</span>:</span>
ch, first, selected, paths = <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, listdir()
<span class="hljs-keyword">while</span> ch != ascii.ESC:
height, _ = screen.getmaxyx()
screen.clear()
<span class="hljs-keyword">for</span> y, path_ <span class="hljs-keyword">in</span> enumerate(paths[first : first+height]):
screen.addstr(y, <span class="hljs-number">0</span>, path_, A_REVERSE * (selected == first + y))
ch = screen.getch()
selected += (ch == KEY_DOWN) - (ch == KEY_UP)
selected = max(<span class="hljs-number">0n class="p"></span>, min(len(paths)<span class="hljs-number">-1</span>, selected))
first += (first &lt;= selected - height) - (first &gt; selected)
<span class="hljs-keyword">if</span> ch <span class="hljs-keyword">in</span> [KEY_LEFT, KEY_RIGHT, KEY_ENTER, <span class="hljs-number">10</span>, <span class="hljs-number">13</span>]:
new_dir = <span class="hljs-string">'..'</span> <span class="hljs-keyword">if</span> ch == KEY_LEFT <span class="hljs-keyword">else</span> paths[selected]
<span class="hljs-keyword">if</span> path.isdir(new_dir):
chdir(new_dir)
first, selected, paths = <span class="hljs-number">0</span>, <span class="hljs-number">0</span>, listdir()
<span class="hljs-keyword">if</span> __name__ == <span class="hljs-string">'__main__'</span>:
main()
wrapper(main)
</code></pre></div></div>
@ -2975,7 +2975,7 @@ $ pyinstaller script.py --add-data '&lt;path&gt;:.' <span class="hljs-comment">
<span class="hljs-keyword">from</span> collections <span class="hljs-keyword">import</span> defaultdict, namedtuple
<span class="hljs-keyword">from</span> dataclasses <span class="hljs-keyword">import</span> make_dataclass
<span class="hljs-keyword">from</span> enum <span class="hljs-keyword">import</span> Enum
<span class="hljs-keyword">import</span> re, operator <span class="hljs-keyword">as</span> op, itertools <span class="hljs-keyword">as</span> it, functools <span class="hljs-keyword">as</span> ft
<span class="hljs-keyword">import</span> functools <span class="hljs-keyword">as</span> ft, itertools <span class="hljs-keyword">as</span> it, operator <span class="hljs-keyword">as</span> op, re
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main</span><span class="hljs-params">()</span>:</span>

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