python enumerateÓ÷¨
python cookbook
Recipe 2.5. Counting Lines in a File
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enumerate
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for
i
in
range
(0
,
len
(list
)):
print
i
,
list
[
i
]
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def
enumerate
(collection
):
'Generates an indexed series:
(0,coll[0]), (1,coll[1]) ...'
i
=
0
it
=
iter
(collection
)
while
1
:
yield
(i
,
it
.
next
())
i
+=
1
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for
index
£¬
text
in
enumerate
(list
)):
print
index
,
text
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count
=
len
(open
(thefilepath
,
‘
rU
’
).
readlines
())
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Count
=
-
1
For
count
,
line
in
enumerate
(open
(thefilepath
,
‘
rU
’
))£º
Pass
Count
+=
1
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