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File Tlo Handling and Exception
Handling
List different modes of opening File in python
[+ Read mode Cpl):
Opens the Mid For recat gott iS _used cohen the
File i Oh) being read. Pia Pile pointer at the
beginning of File. mq
Lalit mode (wt) *
Jal ite paacd ahich (sused to edit and corite mec —
[nPocmction te the i)
2:>Append made Ca")?
Appencdiag mene which is used to acid new data to
the end of the Pile} that isn. information is
Cute matically acljucted ta the end
4+ Read and torite mode ("r+")
pecia) read and rite mod. cohich Ss Used to
handle bath actHans cohen coor king coith Fil
S- Binary read mode ("rh"):
penl a efile For reading ool io binary format
Pla Bile pointer cat the beginning OF the oi)
G2 Binary write mode ( Mw).
Opens the file Fac coriting only in binary Faomat.
ite an
pens the file Por hot
0
ist
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explain use of Forme mato) memes — ‘
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allows deve jopers to—
by embedding
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iD ey Errer ~
— 4. tO Error?
bow t
with open ("“ nenexf stent Pile txt "n") as file!
centent = file. read t)
cent 10 €rrer os €+
| print LE" TO eerer occurred: fei"). =
oes TOErcer occured : Eerrne 23 No such
Cie oF aietctmry | nonexistent = file sbxk’
Attribute Error?
ass FyampieCla: He
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except keyrrar as _¢
| print Ce" Jey Brean occured : Seg")
CIP i 4 ye cror ocaured 1 Monenistent —Isey"
B-S| Explain the uSe oF keyword "raise" Por Python's
exception handling, Also explain New to create
use r- dejined exception in Pythen.
Thy = offre.
Canditing OF eccucenss
1
is The catse keyicnned is used to expticitiy raise
| exceptings ducing Cu. tei One
He ef. Ajten USed hen aA Certara mali tt
pure that warrants the raising o¢ ci specicic
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exception. . —
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| except CUurtamerror as ce!
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> print CE" Custer Ereer s foe 3") ao
7: -OlP: Custom Error: This is a Custam ences —
se message!
3
T » 1 —
tT [- 5.0 the bos exacpie,
sThe Custom Error ola P cla ined| Foheritins
—e lero om Eaception. zt hasan eptional mess e
parameter.
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A_fnstance of custem Error is roy ith
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pichonary
Pythoes aS. module provides methods that hbejp you _
_—_L_perferm— file = processing Operations, SuchoS
___ renaming—cuncl__clelering_
putt = fn fue? for fr ~ ___
| remove _anel_ rename 0), Te Use _tnese _firn?_cos—
_bave te import os maclule First and theo sou
can cout_any relatecl Pune tions.
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i) rename 1)
| the rename ct) tncrion takes A100 _cicqueremt S_, tne
___Leuerent. etre | directory —_name One + mero. ete }
Lstirectany = Name
Syokeu! 2
Los. rename (curreot = file) clirec Pye Dame Nevo. File)
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[ne temavet) funtion _is to cleiete dineetany by
—PSeeci tying 145 name ac the aegunment____
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