\frametitle{How to start}
\framesubtitle{Interpreter}
\begin{minted}[breaklines=true]{pycon}
-Python 3.5.1 (default, Dec 7 2015, 12:58:09)
+Python 3.5.1 (default, Dec 7 2015, 12:58:09)
[GCC 5.2.0] on linux
Type "help", "copyright", "credits" or "license" for more
information.
\mintinline{python}{float} & \mintinline{python}
{1.0, 4.5, 5e9, float('NaN'), float('inf')}\\
\mintinline{python}{str} & \mintinline{python}
- {'hi', "hi", '"', "'", """hi""", "\n\"\t", '\"'}\\
+ {'hi', "hi", '"', "'", """hi"""}\\
\mintinline{python}{list} & \mintinline{python}
{[], ..., [1, 2, 3], ['a', 42], [[], [1]]}\\
\mintinline{python}{tuple} & \mintinline{python}
\subsection{Functions}
\begin{frame}[fragile]
\frametitle{Functions}
+ \begin{minted}{python}
+def fizzbuzzrange(n, m):
+ """Print fizzbuzz for all numbers between n and m"""
+ for i in range(n, m):
+ fizzbuzz(i)
+
+def fizzbuzz(n):
+ """Print for number i the fizzbuzz"""
+ if i % 3 == 0 and i % 5 == 0:
+ print('fizzbuzz')
+ elif i % 3 == 0:
+ print('buzz')
+ elif i % 5 == 0:
+ print('fizz')
+ else:
+ print(i)
+fizzbuzzrange(0, 1000)
+ \end{minted}
\end{frame}
\begin{frame}[fragile]
\frametitle{Functions: Advanced arguments}
+ \begin{minted}{python}
+def function(arg1, arg2, kwarg1="hi", kwarg2=42):
+ """Docstring,
+ run help(functionname) in the interpreter
+ to see this helpstring
+ """
+ pass
+
+def function(*args):
+ for i, a in enumerate(args):
+ print("argument: ", i, ": ", a)
+
+def function(**kwargs):
+ for k, v in kwargs:
+ print("argumentkey: ", k, "=", v)
+def function(arg1, arg2, arg3=4, *args, **kwargs):
+ pass
+ \end{minted}
+\end{frame}
+
+\begin{frame}[fragile]
+ \frametitle{Functions: Advanced functions}
+ \begin{minted}{python}
+def compare(this, that, comparefunc=lambda x, y: x > y):
+ return comparefunc(this, that)
+ \end{minted}
+ \begin{minted}{pycon}
+>>> compare(42, 2)
+True
+>>> compare(42, 2, lambda x, y: x < y)
+False
+>>> def compare_len(x, y):
+... return len(x) > len(y)
+...
+>>> print(compare_len)
+<function compare_list at 0x7f075cd5b730>
+>>> compare([1, 2, 3, 4], [3, 4, 5])
+False
+>>> compare([1, 2, 3, 4], [3, 4, 5], compare_len)
+True
+ \end{minted}
\end{frame}
\section{Datastructures}
+\begin{frame}
+ \frametitle{Lists}
+ \begin{tabular}{ll}
+ In-situ & Copy\\
+ \mintinline{python}{lst.append(x)}\\
+ \mintinline{python}{lst.extend(x)} &
+ \mintinline{python}{lst1 + lst2}\\
+ \mintinline{python}{lst.insert(i, x)}\\
+ \mintinline{python}{lst.remove(x)}\\
+ \mintinline{python}{lst.clear(x)} &
+ \mintinline{python}{lst = []}\\
+ \mintinline{python}{lst.reverse(x)} &
+ \mintinline{python}{reverse(lst)}\\
+ \ldots
+ \end{tabular}
+\end{frame}
+
+\begin{frame}[fragile]
+ \frametitle{Sequences}
+ \begin{block}{Tuples}
+ \begin{minted}{python}
+# Auto unpack
+x = (42, 43)
+x1, x2 = x
+ \end{minted}
+ \end{block}
+
+ \begin{block}{Sequence modifiers}
+ \begin{minted}{python}
+x = {3, 2, 1}
+lx = list(x) # items in random order
+sx = sorted(x) # [1, 2, 3]
+rx = reversed(sx) # [3, 2, 1]
+rx = enumerate(rx) # [(0, 3), (1, 2), (2, 1)]
+ \end{minted}
+ \end{block}
+\end{frame}
\section{Input/Output}
+\begin{frame}[fragile]
+ \frametitle{Strings}
+ \begin{minted}{pycon}
+>>> s = 'Hello, world.'
+>>> str(s)
+'Hello, world.'
+>>> repr(s)
+"'Hello, world.'"
+>>> str(1/7)
+'0.14285714285714285'
+>>> x = 10 * 3.25
+>>> y = 200 * 200
+>>> s = 'The value of x is ' + repr(x) + ', and y is ' + repr(y) + '...'
+>>> print(s)
+The value of x is 32.5, and y is 40000...
+>>> hello = 'hello, world\n'
+>>> hellos = repr(hello)
+>>> print(hellos)
+'hello, world\n'
+ \end{minted}
+\end{frame}
+
+\begin{frame}[fragile]
+ \frametitle{String formatting}
+ \begin{minted}{python}
+'We are the {} who say "{}!"'.format('knights', 'Ni')
+# We are the knights who say "Ni!"
+
+'{0} {0} {1}'.format('ekke', 'ptang')
+# ekke ekke ptang
+
+# Number formatting and padding
+'{0:.3f} {1:03d} "{2:<5}" "{2:,>5}"'.format(
+ 1.0/3, 42, 'hi')
+# '0.333 042 "hi " ",,,hi"
+
+# Other Usefull string function
+','.join(['a', 'b', 'c'])
+'a,b,c'.split(',')
+ \end{minted}
+\end{frame}
+
+\section{And much more\ldots}
+\begin{frame}[fragile]
+ \frametitle{Error handling}
+ \begin{minted}{python}
+try:
+ x = 5/0
+except ZeroDivisionError as e:
+ print(e)
+
+try:
+ do_some_stuff()
+except:
+ rollback()
+ raise
+else:
+ commit()
+finally:
+ cleanup()
+ \end{minted}
+\end{frame}
-\section{Errors}
+\begin{frame}[fragile]
+ \frametitle{Libraries}
+ \mintinline{python}{import modulename}\\
+ \mintinline{python}{from modulename import name1, name2}\\
+ \begin{enumerate}
+ \item System: \mintinline{python}{os, sys, glob}
+ \item Math: \mintinline{python}{math, random, statistics}
+ \item Text: \mintinline{python}{re, locale, gettext, codecs}
+ \item Internet: \mintinline{python}{irllib, email, smtplib, poplib}
+ \item Data: \mintinline{python}{sqlite, json, csv, xml.etree}
+ \item Command line:
+ \mintinline{python}{curses, urwid, readline, getopts, argparse}
+ \item GUI: \mintinline{python}{Tkinter, PySide/PyQt, PyGobject}
+ \item \ldots
+ \end{enumerate}
+\end{frame}
-\section{Standard Library}
+\begin{frame}[fragile]
+ \frametitle{And much more\ldots}
+ \begin{itemize}
+ \item Function annotations: \mintinline{python}{def fun(n) -> str:}
+ \item Iteration through: \mintinline{python}{yield}
+ \item List comprehension:
+ \mintinline{python}{[x**2 for x in range(0, 5)]}
+ \item Functional style: \mintinline{python}{map, filter, reduce}
+ \item Classes, inheritance: \mintinline{python}{class}
+ \item Context blocks: \mintinline{python}{with}
+ \item String templating
+ \item Coding style: \url{https://www.python.org/dev/peps/pep-0008/}
+ \end{itemize}
+\end{frame}
\end{document}
repositories / linuxnijmegen-python.git / commitdiff