源碼：

poem='''\

Programming is fun

When the work is done

if you wanna make your work also fun:

use Python!

'''

f=file('poem.txt','w') # open for 'w'riting

f.write(poem) # write text to file

f.close() # close the file

f=file('poem.txt')

# if no mode is specified, 'r'ead mode is assumed by default

while True:

line=f.readline()

if len(line)==0: # Zero length indicates EOF

break

print(line)

# Notice comma to avoid automatic newline added by Python

f.close() # close the file

錯誤提示：

Traceback (most recent call last):

File "C:\Working\Downloads\using_file(1).py", line 11, in

f=file('poem.txt','w') # open for 'w'riting

NameError: name 'file' is not defined

解決方法：

將file()改成open(),看來python3不再支持file().

如：

poem='''\

Programming is fun

When the work is done

if you wanna make your work also fun:

use Python!

'''

f = open('c:/working/amy/poem.txt','w') # open for 'w'riting

f.write(poem) # write text to file

f.close() # close the file

f = open('c:/working/amy/poem.txt')

# if no mode is specified, 'r'ead mode is assumed by default

while True:

line=f.readline()

if len(line)==0: # Zero length indicates EOF

break

print(line)

# Notice comma to avoid automatic newline added by Python

f.close() # close the file

運行結果：

>>> ================================ RESTART ================================

>>>

Programming is fun

When the work is done

if you wanna make your work also fun:

use Python!

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