Python Learning Notes

2014.08. 22

For information about the latest releases and related tools,the python.org website is a cornucopia.

Windows Installation:python x.x or ActivePython

Python is an interpretative, object-oriented, high-level programming language with dynamic semantics.

Liunx, enter python to start the interactive python interpreter,ctrl-d exit the interactive interpreter;

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1.The Python line is a row , not like other computer languages, each line to the end of a good.

2. if one of the two numbers participating in the division is a floating-point number, the result is also a float:

>>>1/2.0

0.5

If you want python to perform only normal division, you can precede the program with

>>>from __future__ Import Division

>>>1/2

0.5

Alternatively, you can use the command switch -qnew.

Python also provides another operator to achieve the division of the integer ------ double Slash

>>>1//2

0

3. The remainder of the x%y operator ------- The result of x divided by y

4. Power operator

>>>2**3

8

The power operator has a higher precedence than the inverse (unary minus operator), so -3**2 is equivalent to-(3**2)

5. A variable is a name that represents or refers to a value. Variable names can contain letters, numbers, and underscores (_). A variable cannot begin with a number.

6. in python3.0 ,print is a function that requires writing printinstead of print 42.

general definition of statement attributes: they change things. For example, the assignment statement changes the variable, andthe print statement changes the contents of the screen display.

7. Input function

>>>x=input ("x:")

X:32

>>>y=input ("Y:")

Y:32

>>>print X*y

1024

The statement following the Python prompt (>>>) can be counted as part of a complete program.

Python Learning Notes