Python Basic formatted output

A= ' This is a '

B=a.replace (' A ', ' B ') string substitution

C= ' This is%s%s '% (' my ', ' Apple ')

D= ' This is {} {} '. Format (' My ', ' Apple ')

E= ' This is {1} {0} '. Format (' Apple ', ' my ') formatted output, output order

F= ' This is {whose} {fruit} '. Format (fruit= ' Apple ', whose= ' my ')

G= ' This is% (whose) s% (fruit) s '%{' fruit ': ' apple ', ' whose ': ' My '} Another formatted output, followed by a dictionary that corresponds to the previous key's value%s, defined by the key% after the value

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Read file

1, f=open (' filename ', ' W ')

F.write (' This is file ')

F.close

2. F=file (' filename ', ' r ')

F.read (20)

F.seek (0) back to the first position of the file cursor

F.close ()

3. Import Linecache

Linecache.getline (' filename ', line number)

A=linecache.getlines (' filename ')

Print A is stored in the list

Python Basic formatted output