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lesson12-3
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Commit
2609c921
authored
Oct 22, 2020
by
BellCodeEditor
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diy.py
diy.py
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2609c921
# 写入同学们的捐赠明细:'小兰:12本'、'小丽:11本'、'李文:9本'、'张伟:16本'
# 写入同学们的捐赠明细:'小兰:12本'、'小丽:11本'、'李文:9本'、'张伟:16本'
# 打开、创建文件,这里的路径要换成自己哦~
file1
=
open
(
r'C:\Users\CM\Desktop\book.txt'
,
'w'
,
encoding
=
'utf-8'
)
# 写入数据
file1
.
write
(
'小兰:12本
\n
'
)
file1
.
write
(
'小丽:11本
\n
'
)
file1
.
write
(
'李文:9本
\n
'
)
file1
.
write
(
'张伟:16本
\n
'
)
# 关闭文件
file1
.
close
()
# 补充捐赠明细,两种写法:
# 补充数据的第一种写法:
file
=
open
(
r'C:\Users\CM\Desktop\book.txt'
,
'a'
,
encoding
=
'utf-8'
)
file
.
write
(
'小强:10本
\n
'
)
file
.
write
(
'李明:15本
\n
'
)
file
.
close
()
# 补充数据的第二种写法:
with
open
(
r'C:\Users\CM\Desktop\book.txt'
,
'a'
,
encoding
=
'utf-8'
)
as
file
:
file
.
write
(
'小强:10本
\n
'
)
file
.
write
(
'李明:15本
\n
'
)
# 修改小强的数据为11本,以及小兰的数据'小兰:12本'修改为14本,最后读取修改后的数据
new_data
=
''
with
open
(
r'C:\Users\CM\Desktop\book.txt'
,
'r'
,
encoding
=
'utf-8'
)
as
file1
:
for
data
in
file1
:
if
'小强:10本'
in
data
:
data
=
data
.
replace
(
'小强:10本'
,
'小强:11本'
)
if
'小兰:12本'
in
data
:
data
=
data
.
replace
(
'小兰:12本'
,
'小兰:14本'
)
new_data
+=
data
with
open
(
r'C:\Users\CM\Desktop\book.txt'
,
'w'
,
encoding
=
'utf-8'
)
as
file1
:
file1
.
write
(
new_data
)
with
open
(
r'C:\Users\CM\Desktop\book.txt'
,
'r'
,
encoding
=
'utf-8'
)
as
file1
:
a
=
file1
.
read
()
print
(
a
)
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