51. Programming:
Let instructions executed by a computer.
52. Code:
Let the computer to execute the command.
53. underlying programming language:
Compared with the high-level language, closer to the binary language.
54. The high-level programming languages:
Easy to understand language reads like English.
55. The assembly language:
Difficult to read and understand the programming language.
56.Python：
(This I do not nonsense,
Rookie Tutorial: https: //www.runoob.com/python/python-tutorial.html)
57. Functions:
Accept input, output and execute the statement.
58. practice:
Generally accepted way.
59. call:
Program input parameters so that the normal output.
60. parameters:
The data transfer function.
61. Required parameters:
Non-optional parameters.
E.g:
. 1 # X is a mandatory parameter 2 DEF asd_ww (X, Y =. 1 ): . 3 return X- Y . 4 . 5 V = asd_ww (. 3 ) . 6 Print (V) . 7 . 8 >> 12 is
62. Optional parameters:
The argument is not to offer.
E.g:
. 1 # Y is optional and 2 DEF asd_ww (X, Y =. 1 ): . 3 return X- Y . 4 . 5 V = asd_ww (. 3 ) . 6 Print (V) . 7 . 8 >> 12 is
63. Built-in functions:
Python built-in functions.
E.g:
1 # Check current built-in functions of the python interpreter 2 Import keyword . 3 . 4 Print (keyword.kwlist) . 5 . 6 >> [ ' False ' , ' None ' , ' True ' , ' and ' , ' AS ' , ' Assert ' , ' the async ' , ' the await ' , ' BREAK ' , ' class ' ,'continue', 'def', 'del', 'elif', 'else', 'except', 'finally', 'for', 'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'nonlocal', 'not', 'or', 'pass', 'raise', 'return', 'try', 'while', 'with', 'yield']
64. Scope:
Range of variables can be read.
65. The global scope:
Variables can be read in the whole program.
66. Global variables:
We have global effect of variables.
E.g:
1 x=1 2 y=2 3 4 print(x) 5 6 >>1
67. The local scope:
Read only variable in a function (or class) which was defined in the scope.
E.g:
. 1 DEF F (); 2 A. 1 = # local variables within the defined function, the function can only be called in . 3 B = 2 . 4 . 5 Print (A) # attempt to call out the function . 6 . 7 >> NameError: name ' A ' IS not defined
68. exception handling:
Detect an error condition, if they meet the definition of conditions, catch the exception and decide how to proceed.
E.g:
. 1 A. 3 = 2 B = 0 . 3 # Print (A / B) # If this line runs directly occurs 'ZeroDivisionError' error . 4 the try : . 5 Print (A / B) . 6 the except the ZeroDivisionError: # List errors that may occur 7 Print ( " you make a mistake! " ) 8 9 >> make a mistake!
69. Documents string:
Interpretation function function, a string parameter type recorded.
E.g:
. 1 DEF F (x, y): 2 "" " . 3 returns the value of x + y is . 4 : param x: int . 5 : param y: int . 6 : return: int, product of x and y is . 7 " "" . 8 return x * y
70. The method:
Function closely associated with the specified data type.
71. iterable:
It refers to the object can not use a loop element itself is accessed.
E.g;
1 a="ajshfdsh" 2 i=0 3 for i in a: 4 print(i) 5 6 >> 7 a 8 j 9 s 10 h 11 f 12 d 13 s 14 h
72. iterables:
Objects may be iterative, such as strings, lists, and elements.
73. The index (index):
The representative position of the element in the iterable.
E.g:
1 a=['a','b','c'] 2 s=a.index('b') 3 print(s) 4 5 >>1
74. Variable:
The contents of the container can vary. Such as a list (list), Dictionary (dic)
75. immutable:
Change the contents of the container can not occur. The tuple (tuple)
76. Dictionary (dic):
A built storage container object with the corresponding 'key' and 'value. "
E.g:
1 a={'name':'xiaoming','age':18}
77. Key:
It is used to find the value corresponding to the dictionary.
E.g:
1 a={'name':'xiaoming','age':18} 2 3 print('name') 4 5 >>xiaoming
78. values:
Dictionary median mapped keys.
79. Mapping:
An object connected to the other object.
80. The key-value pairs:
Dictionary median mapped to.
81. Negative Index:
From right to left may find elements (normal order is from left to right) iteration object.
E.g:
1 a=['a','b','c'] 2 s=a[-1] 3 print(s)
82. Escape:
Characters have special significance in python, tells the program is not executed. Such as:" ",#
83. Slice:
Iteration will be a subset of objects, create a new iterable.
E.g:
1 a=['a','b','c'] 2 3 print(a[0:2]) 4 5 >>['a', 'b']
84. The starting index:
Beginning slice of the index.
85. The end index:
End index slices.
86. cycle:
When the code does not define conditions for implementation of a code.
E.g:
1 # Dead cycle 2 the while True: . 3 Print ( ' Hello World ' )
87. traversal:
For each element of loop iteration object.
88.for cycle:
In a loop iteration object.
E.g:
1 a="123" 2 i=0 3 for i in a: 4 print(i) 5 6 >>1 7 2 8 3
89. The index variable:
Variable is the position of the element to be iterative.
90.while cycle:
As long as the expression evaluates to True loop execution would have been down.
E.g:
1 while True： 2 print（‘123’） 3 4 >>123 5 123 6 123 7 123 8 ...
91. infinite loop:
Never loop termination.
92.break statement:
To terminate the cycle.
E.g:
1 while True: 2 print("123") 3 break 4 5 >>123
93. The outer loop:
Comprising inner loops nested loops.
E.g:
. 1 A = [l, 2,3 ] 2 B = [4,5,6 ] . 3 C = [] . 4 for I in A: # external circulation . 5 for J in B: inner loop # . 6 c.append (I + J ) . 7 . 8 Print (C) . 9 10 >> [. 5,. 6,. 7,. 6,. 7,. 8,. 7,. 8,. 9]
94. The inner loop:
In another nested loop cycle.
95. Module:
python file contains code that nickname.
96. Built-in modules:
python built-in module.
97. Import (import):
Import module. Such as: import keyword
98. The read (reading):
Data Access file.
99.写（writing）：
Add or modify data in the file.
100.with statement:
A composite statement, statement when executing the line, the next line of behavior is performed automatically.
E.g:
1 with open（“a.text”,"w"）as f: 2 f.write("hello world")
101.CSV file:
Suffix .CSV file, commonly used for management reporting procedures (eg: Excel).