File-Handling. - people.iitgn.ac.inpeople.iitgn.ac.in/~gmanoj/ES112-2019/FileHandling.pdf ·...
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File-Handling. data. txt Amar, 40, 40 Akbar, 20, 30 Anthony, 10, 10
Transcript of File-Handling. - people.iitgn.ac.inpeople.iitgn.ac.in/~gmanoj/ES112-2019/FileHandling.pdf ·...
File-Handling.
d a t a . t x t
Am a r , 4 0 , 4 0A k b a r , 2 0 , 3 0Anthony, 1 0 , 1 0
Reading a f i l e
f = open ( "data-tat" )
Reading a f i l e
f = open ( "data-tat" )
Tpath t o t h e f i l e t h a t n e ed s t o
b e opened.
Reading a f i l e
f = open ( "da t a - t a t " , "r")4T o b e r e a d only
Reading a f i l e
f = open ( "da t a - t a t " , "xx")
A n e w f i l e d a t a . t n t i s c rea ted .
I f d a t a - t x t already e x i s t s t h e ni t i s t r u n c a t e d a n d overwritten
Reading a f i l e
f = open ( "da t a - t a t " , "a")
TTO b e u s ed if w e w a n tt o w r i t e t o a n existing
f i l e .
f = open ( "da ta - ta t ", " r")
string = f r e a d l ) bread a l l t h e input
print (string)
f = open C " d a t a . t x t " . " r")
print ( f . r e a d4)
f . r e a d l ) r e a d e n t i r e con ten t of f i l ef . read l inet ) r e a d t h e n e x t l i n e of f i l e .
f . r e a d C) : r e a d e n t i r e con ten t of f i l ef . re ad l i n e t ) : r e a d t h e n e x t l i n e of f i l e .f . r e a d l i n e s l ) : r e t u r n s a l i s t w h e r e each i t e m
i s o n e l i n e of f i l e
f . o p e n ( "data-tx t" )
for l i n e i n f - r e a d l i n e s l ) :pr int 1 l i n e , e n d - " " )
fo r l i n e i n f :print ( l i n e ende " " )
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t x t
i f (Quiet t Quiz-2) 7 , 8 0 A
d i f (Quiet t Quiz-2) x 5 0 B
e l s e C
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t x t
i f (Quiet t Quiz-2) 7 , 8 0 A
d i f (Quiet t Quiz-2) x 5 0 B
e l s e C
Ama r , 4 0 1 4 0A k b a r , 2 0 , 3 0Anthony, 10,10
A m a r tAkba r B
Anthony C
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t x t
f - open ( " d a t a . txt' ')
f o r l i n e i n f . r e a d l i n e s l ) :
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t a t
f - open ( " d a t a . tx t" )
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t x t
f - open ( " d a t a . tx t" )
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
p r in t ( " E s t a " , ende"")
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t a t
f = open ( " d a t a . tx t" )
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
p r in t ( " E s t a " , ende"")
qu i z I = i n t ( e s t[13)qu i z 2
= i n t ( e s t [ d )
Ca lcu la te t h e grade of a l l s tuden ts i nd a t a . t x t
f - open ( " d a t a . txt' ')
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
p r in t ( " E s t a " , ende"")
qu i z I = i n t (estate)qu i z 2
= i n t ( e s t [ d )
i f CquizItquiz2)> = 8 0 :
print ( "A")d i f qu ie t quiz2 7 = 5 0 :print ( " B " )e l s e : pr in t ( "C")
W r i t e t h e grades i n another f i l e grades-tat.
Am a r , AAkbar, BAnthony, C
How t o w r i t e t o a f i l e ?
t o u t = open ( "grades-txt". "w")
l i n e = "Am a r , A"tout . w r i t e ( l i n e )
How t o w r i t e t o a f i l e ?
t o u t = open ( "grades-txt". "w")
l i n e = "Am a r , A"tout . w r i t e ( l i n e )
f o o t . w r i t e ( "Akba's, ①")
How t o w r i t e t o a f i l e ?
t o u t = open ( "grades-txt". "w")
l i n e = "Am a r , A i n "tout . w r i t e ( l i n e )
f o o t . w r i t e ( "Akba's, ①")
Complete t h e codef . open ( " d a t a . tx t" )
f o r l i n e i n f . r e a d l i n e s D :
l e s t e l i n e . splitC",")
p r in t ( " E s t a " , ende"")
qu i z I = i n t ( e s t[13)qu i z 2
= i n t ( e s t [ d )
i f CquizItquiz2)> = 8 0 :
print ( "A")e l i f qu ie t quiz2 7 = 5 0 :print ( " B " )e l s e : pr in t ( "C")
Complete t h e code
open ( " d a t a . txt' ')tffut'= open L''grades-tat", "xx")
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
p r in t ( " E s t a " , ende"")
qu i z I = i n t ( e s t e )qu i z 2
= i n t ( e s t [ d )
i f CquizItquiz2)> = 8 0 :
print ( "A")e l i f qu ie t quiz2 7 = 5 0 :print ( " B " )e l s e : pr in t ( "C")
Complete t h e code
open ( " d a t a . txt'Dtffut'= open L''grades-tat", "xx")
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
t o r e r i t e = t e s t t o ]
qu i z I = i n t ( e s t a )qu i z 2
= i n t ( e s t [ d )
i f (quiz1-1%22)> = 8 0 :
print ( "A")d i f qu ie t quiz2 7 = 5 0 :print ( " B " )e l s e : pr in t ( "C")
Complete t h e code
open ( " d a t a . txt' ')tffut'= open L''grades-tat", "xx")
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
t o r e s i t e = l s t l o ]
qu i z I = i n t ( e s tes )qu i z 2
= i n t ( e s t [ d )
i f CquizItquiz2)> = 8 0 :t ow r i t e t = " A i n "
e l i f qu ie t quiz2 7 = 5 0 :e l s e :
t o # N i t e t e "
, B i n "
t o n i t e t = " f i n "
Complete t h e code
open ( " d a t a . txt'Dtffut'= open L''grades-tat", "xx")
f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
t o r e r i t e = t e s t 103
qu i z I = i n t ( e s t e )qu i z 2
= i n t ( e s t [ d )
i f (quiz1-1%22)> = 8 0 :t ow r i t e t = " A i n "
e l i f qu ie t quiz2 7 = 5 0 :e l s e :
t o # N i t e t e "
, B i n "
t o n i t e t = " f i n "font . w r i t e ( t o n i t e )
Ideally c lose t h e f i l e t h a t you h a v eopened
Complete t h e codeo p e n ( " d a t a . tx t" )I I I . ' =
op en L''grades-tat", "xx")f o r l i n e i n f . r e a d l i n e s l ) :
l e s t = l i n e . splitC",")
t o w o i t e = l s t l o ]
qu i z I = i n t ( e s tes )qu i z 2
= i n t ( e s t [ d )
i f CquizItquiz2)> = 8 0 :t ow r i t e . t = " A i n "
e l i f q u i e t q u i z2 7 = 5 0 :
e l s e :t o # N i t e t e "
, B i n "
t o n i t e t = " f i n "font . w r i t e ( t o n i t e )f . c l o s e d f o u t . closet)
