First, the entire contents of review: basic, basic data types, functions, and object-oriented
Design development is greater than the true
Encoding: the machine can be directly recognized language
Bytecode: generating high-level language bytecode Cpython e.g., the need for internal language into machine code
1 python environment variable configuration
1.1 Configuration Environment Variables
Properties - Advanced - environment variables, among the plurality of environment variables; partition
Configuration environment variable effect: after the path environment variable added, when the terminal performs not enter the full path
2 variables
2.1 Variable names on behalf of that value, the value may be changed
Composition: letters, numbers, underscores, and the data can not begin
2.1 Variable names Notes
1) Python keywords not be used as a variable name, for example: as \ break \ continue \ class \ def \ del \ else \ as \ except \ and ........
2) the variable name is not the same thing and Python built (Example: built-in methods, built-in class)
3) Naming the best variable name has meaning, easy to understand code reader, for example: user_id, Java language hump pay attention, for example: usr the I d
4) single-line comment with #, multi-line comment with the quotation marks "" "............" ""
3 inpput usage
input = waits until the user enters values
Example: user_id = input ( '' Please enter a user name)
4 Basic Data Type: String \ Digital
4.1 string: quotation marks content, called string
String contains algorithms: + addition, multiplication *
4.1.1 Examples
n1="Tony"
n2="18"
n3 = n1 + n2
print n3
n4=n1*n2
n5 = n1 * 3 ------ n5 is equal to three times repeated n1, n5 = TonyTonyTony
4.2 Digital: no quotation marks figures
Algorithm for Digital included: + plus, minus -, * multiplication, addition //, a power of **% to get the remainder division, dividing the quotient taken //
4.2.1 Examples
A determination is odd or even
a=13
temp=a%2
if temp==0
print ( "a is an even number")
else:
print ( "a is an odd number")
5 condition if \ else \ elif \ if nested \ whlie
5.1 indented code block to be consistent