Python教程 / Python tutorial

Nov 26, 20152 likes683 views

Python is an interpreted, object-oriented programming language created by Guido van Rossum in 1989. It features an easy to read syntax, automatic memory management, dynamic typing, and is cross-platform. Python can be used for web development, data analysis, scientific computing, and more. It has a simple syntax and extensive libraries that make it ideal for beginners to learn.

Python Tutorial
For Beginners
对
2015-11-20
http://pqx.ee/

Python
/ˈpaɪθɑːn/ in us
or
/ˈpaɪθən/ in uk

Created By
Guido van Rossum
in 1989
- 1989 快以可
⽣生起快 “ ”
- ABC 快⼤大
perl lisp
-

Most read

• 了了
• 了中⼀一了
• ( )
• 著
• ( & )
Language Features

• Beautiful is better than ugly
• Explicit is better than implicit
• Simple is better than complex
• Complex is better than complicated
• Readability counts
The Zen of Python

there should be one
and preferably only one
obvious way to do it
快
• 和
• 发好

• Web Web
• Scipy Numpy
• 有 (google TensorFlow)
• GUI PyQT wxWorks
• ( perl bash)
•

Installation /
• brew install python
• apt-get install python
• yum install python
• … also, binary Installer for Windows

Hello World
print “hello world”
• Just as simple as

Interrupter / 能
能 evaluate
能
有
有
能
* python
能
能

run python code /
$ python helloWorld.py
• python 有
• CPython • IPython
• PyPy
• IronPyton
• Jython

run python code /
• REPL 也
$ python
Python 2.7.10 (default, Jul 14 2015, 19:46:27)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on
darwin
Type "help", "copyright", "credits" or "license" for more
information.
>>> print "hello world"
hello world
(Read-Eval-Print Loop)

Mathematics /
+, -, *, /, //, %, **
出 (3.5 ) @
==, >, <, >=, <=, !=
and, or, not
=, +=, -=, *=, /=, %=

variables /
x = 1
x = ‘hello world!’
• 了快
•
• 好

Mathematics /
• (++) 不(--)
x = 3
x += 1
x -= 2

indentation /
if x >= 60:
print ‘passed!’
else:
print ‘failed!’
• { }
python

comments /
# comments in single line
•
•
'''comments in multi line
line 2
line 3
'''

conditions /
if x >= 90:
print ‘A’
elif x >= 75:
print ‘B’
elif x >= 60:
print ‘C’
else:
print ‘D’
• if else elif

conditions /
switch !!!
成if... elif... elif... else

loops /
x = 0
while(x<100):
x = 1
print x
• while

loops /
for i in range(100):
print i
• for..in..

loops /
• continue break
(c java )
x = 0
while True:
x = x + 1
if x > 100:
break

loops /
• while for..in..
• do..while
• until
• goto

set / 是
• 新 list
>>> set([1, 2, 3, 4, 1, 2])
set([1, 2, 3, 4])

• int
• ﬂoat
• complex
Mutable Immutable
• str
• list
• set
• dict
• tuple
•

function /
• 快 None
def square(x):
return x*x

• *
def square_sum(*values):
s = 0
for i in values:
s += i*i
return s

( )
• * *
def print_values(**values):
for k in values:
print ‘%s => %s’ % (k, values[k])

class / 了好
class Animal():
def __init__(self, name):
self.name = name
def sayHi(self):
print self.name, 'says Hi!'

builtin method / 要
• __init__
• __del__
• __repr__
• __str__
• __unicode__

class Cat(Animal):
def __init__(self, name='kitty'):
self.name = name
def sayHi(self):
print ‘hello %s mio!’ % self.name

module /
• 最
• sys.modules
开
开 PYTHONPATH
开要

IO
• raw_input (python3 input)
• sys.stdin sys.stdout
• print

—
• dir hasattr getattr setattr
• eval exec
• locals globals

要
• 成 __doc__ __name__ __ﬁle__
• : __dict__ __class__
• 了: __doc__ __module__ __dict__
__bases__

• 了了
• 了中⼀一了
• ( )
• 著
• ( & )
Features /

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Python教程 / Python tutorial

1. Python Tutorial For Beginners 对 2015-11-20 http://pqx.ee/

2. Intro 时

3. Python /ˈpaɪθɑːn/ in us or /ˈpaɪθən/ in uk

4. Created By Guido van Rossum in 1989 - 1989 快以可⽣生起快 “ ” - ABC 快⼤大 perl lisp -

5. Monty Python's Flying Circus BBC 来

7. Features and philosophy

8. • 了了 • 了中⼀一了 • ( ) • 著 • ( & ) Language Features

9. • Beautiful is better than ugly • Explicit is better than implicit • Simple is better than complex • Complex is better than complicated • Readability counts The Zen of Python

10. there should be one and preferably only one obvious way to do it 快 • 和 • 发好

11. batteries included 快 • GUI • •

13. 为过成 “ ⾃自” “ 上” “ ”

14. Use

15. • Web Web • Scipy Numpy • 有 (google TensorFlow) • GUI PyQT wxWorks • ( perl bash) •

16. Python 也

17. Python

18. Raspberry Pi python GPIO Pi python

19. quick start

20. Installation / • brew install python • apt-get install python • yum install python • … also, binary Installer for Windows

21. Hello World print “hello world” • Just as simple as

22. Interrupter / 能能 evaluate 能有有能 * python 能能

23. run python code / $ python helloWorld.py • python 有 • CPython • IPython • PyPy • IronPyton • Jython

24. run python code / • REPL 也 $ python Python 2.7.10 (default, Jul 14 2015, 19:46:27) [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> print "hello world" hello world (Read-Eval-Print Loop)

25. Mathematics / +, -, *, /, //, %, ** 出 (3.5 ) @ ==, >, <, >=, <=, != and, or, not =, +=, -=, *=, /=, %=

26. variables / x = 1 x = ‘hello world!’ • 了快 • • 好

27. Mathematics / • (++) 不(--) x = 3 x += 1 x -= 2

28. indentation / if x >= 60: print ‘passed!’ else: print ‘failed!’ • { } python

29. • 快 • • 没

30. 多 • ...

31. comments / # comments in single line • • '''comments in multi line line 2 line 3 '''

32. conditions / if x >= 90: print ‘A’ elif x >= 75: print ‘B’ elif x >= 60: print ‘C’ else: print ‘D’ • if else elif

33. conditions / switch !!! 成if... elif... elif... else

34. loops / x = 0 while(x<100): x = 1 print x • while

35. loops / for i in range(100): print i • for..in..

36. loops / • continue break (c java ) x = 0 while True: x = x + 1 if x > 100: break

37. loops / • while for..in.. • do..while • until • goto

38. data structures

39. numbers / • int • ﬂoat • complex

40. str / • 好 • % format •

41. list / • • 的 • (List comprehensions)

42. dict / 都( ) • • 的

43. tuple / 个 • 快都 key • list , • 新

44. set / 是 • 新 list >>> set([1, 2, 3, 4, 1, 2]) set([1, 2, 3, 4])

45. bool / • True / False • python :

46. None • False •

47. • int • ﬂoat • complex Mutable Immutable • str • list • set • dict • tuple •

48. functions

49. function / • 快 None def square(x): return x*x

50. • 要快快 def pow(x, y=2): return x**y

51. 好在 • 好在 pow(y=3, x=2)

52. • * def square_sum(*values): s = 0 for i in values: s += i*i return s

53. ( ) • * * def print_values(**values): for k in values: print ‘%s => %s’ % (k, values[k])

54. class and objects 了

55. class / 了好 class Animal(): def __init__(self, name): self.name = name def sayHi(self): print self.name, 'says Hi!'

56. builtin method / 要 • __init__ • __del__ • __repr__ • __str__ • __unicode__

57. • 会 • __x _classname__x

58. class Cat(Animal): def __init__(self, name='kitty'): self.name = name def sayHi(self): print ‘hello %s mio!’ % self.name

59. 了 • 了 •

60. • 1+2 (1).__add__(2) •

61. module and import

62. module / • 最 • sys.modules 开开 PYTHONPATH 开要

63. import / • 快 • (__import__) • execﬁle

64. input and output 下下

65. IO • raw_input (python3 input) • sys.stdin sys.stdout • print

66. • open • read • write

67. json • dumps • loads

68. advanced features

69. • lambda ( ) • • map reduce ﬁlter •

70. — • dir hasattr getattr setattr • eval exec • locals globals

71. 要 • 成 __doc__ __name__ __ﬁle__ • : __dict__ __class__ • 了: __doc__ __module__ __dict__ __bases__

72. • yield 有 • 有 • 了 • C/C++ 分 python

73. summary

74. • 了了 • 了中⼀一了 • ( ) • 著 • ( & ) Features /

75. https://github.com/vinta/awesome-python

76. 去 C JAVA C#

77. Python !!!

Python教程 / Python tutorial

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