現在開始學習檔案了，其實前面的學習中還有不少遺漏的地方，以後我會繼續改進，加油
1.3逐行讀取
1.4建立乙個包含檔案各行內容的列表
1.5使用檔案內容
2.寫入檔案
with
open
('hello.txt'
)as file_object:
text=file_object.read(
)print
(text)--
----
----
----
----
----
----
hello python
how are you?
you are so easy
with
open
('hello.txt'
)as file_object:
text=file_object.read(
)print
(text.rstrip())
----
----
----
----
hello python
how are you?
you are so easy
file_path=
r'c:\users\dell\desktop\hello.txt'
with
open
(file_path)
as file_object:
text=file_object.read(
)print
(text.rstrip())
----
----
----
----
----
hello python
how are you?
you are so easy
with
open
('text_files\hello.txt'
)as file_object:
text=file_object.read(
)print
(text.rstrip())
----
----
----
----
---hello python
how are you?
you are so easy
with
open
('text_files\hello.txt'
)as file_object:
for line in file_object:
print
(line)--
----
----
----
----
-hello python,
how are you?
you are so easy.
with
open
('text_files\hello.txt'
)as file_object:
for line in file_object:
print
(line.rstrip())
----
----
----
----
---hello python,
how are you?
you are so easy.
with
open
('text_files\hello.txt'
)as file_object:
lines=file_object.readlines(
)for line in lines:
print
(line.rstrip())
print
("讀取列表中的元素"
)print
(lines[1]
)---
----
----
----
----
hello python,
how are you?
you are so easy.
讀取列表中的元素
how are you?
with
open
('text_files\hello.txt'
)as file_object:
lines=file_object.readlines(
)hello_string=
' 'for line in lines:
hello_string+=line.rstrip(
)print
(hello_string)
print
(len
(hello_string))-
----
----
----
----
--hello python,how are you?you are so easy.
42
with
open
('text_files\hello.txt'
,'w'
)as file_object:
file_object.write(
'i love python.'
)with
open
('text_files\hello.txt'
)as file_object:
text=file_object.read(
)print
(text)--
----
----
----
----
i love python.
with
open
('text_files\hello.txt'
,'w'
)as file_object:
file_object.write(
'i love python.'
) file_object.write(
'i love hadoop.'
) file_object.write(
'i love r.'
)with
open
('text_files\hello.txt'
)as file_object:
text=file_object.read(
)print
(text.title())
----
----
----
----
i love python.i love hadoop.i love r.
這樣寫入會直接覆蓋原有檔案！！！謹慎操作
如果你只是想在文字的內容後面新增內容，則使用以下方法
with
open
('text_files\hello.txt'
,'a'
)as file_object:
file_object.write(
'i am here.'
) file_object.write(
'i get you.'
) file_object.write(
'go for it.'
)with
open
('text_files\hello.txt'
)as file_object:
text=file_object.read(
)print
(text.title())
----
----
----
----
i love python.i love hadoop.i love r.i am here.i get you.go for it.
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