Python Learning Diary

Python and java,.net,php web platform interaction is best used in Web communication, do not use Jypython,ironpython, the advantage is to be able to keep the program modular, decoupling good

Python allows you to use the "..." method to represent multiple lines of code:

Print (R"'Hello,... lisa! " " ) hello,lisa! >>>

Print ("'line1 ... line2 ... line3") Line1line2line3

You can also use R ' xxx ' to indicate that XXX internally does not do any escape operation, which is beneficial for the native output content.

Print (R'\\\t\\') # Output \\\t\\

Data types that Python can handle directly:

Integer, floating-point number, String, Boolean (True,false),

There is also a list (similar array), Dict (similar to JS object literal)

Constant: PI

Two types of division:

/: Automatic use of floating-point numbers, such as 10/3=3.33333 9/3=3.0

: Rounding 10//3= 3

%: 10%3=1

Attention:

Python supports a variety of data types, and in the computer, any data can be considered as an "object", and variables are used in the program to point to these data objects, the variable assignment is actually the data and variables associated with it "

Python has no size limit for integers

Python string encoding commonly used functions:

Ord (' x ') returns the Unicode encoding corresponding to the X character, and Chr (' Hexcode ') returns the Unicode encoding corresponding to the grandfather

>>> Ord ('A')65>>> ord (' Middle ') 20013>>> chr'B'>>> chr (25991)  ' wen '

Python Learning Diary