未正确覆盖文本文件(Python)
我的程序应该获取一个文本文件,打印内容,计算行数,请求输入一个字符串,删除该字符串的每一次出现,说出删除该字符串的次数,然后输出文件的新内容。我们被要求使用一个文件,而不是输入和输出文件 我的代码可以正常工作并完成它应该完成的所有工作,直到我尝试将更改存储在char_count函数末尾的文件中,而print_输出函数似乎根本无法正常工作 如果我有一个内容输入文件:未正确覆盖文本文件(Python),python,function,readlines,Python,Function,Readlines,我的程序应该获取一个文本文件,打印内容,计算行数,请求输入一个字符串,删除该字符串的每一次出现,说出删除该字符串的次数,然后输出文件的新内容。我们被要求使用一个文件,而不是输入和输出文件 我的代码可以正常工作并完成它应该完成的所有工作,直到我尝试将更改存储在char_count函数末尾的文件中,而print_输出函数似乎根本无法正常工作 如果我有一个内容输入文件: Apples Oranges Bananas Apples Oranges Bananas 如果我尝试删除香蕉,则输入文件的结果文
Apples
Oranges
Bananas
Apples
Oranges
Bananas
如果我尝试删除香蕉,则输入文件的结果文件内容为:
ApplesOrangesApplesOrangesles
Oranges
Bananas
我一直在试图弄清楚到底发生了什么,但没有取得任何进展,我们的课程教科书似乎没有提到覆盖输入文件,但我们被要求做作业。我的最后两个函数有什么问题
def main():
input_file_name = input("Please Enter the name of your text file: ")
infile = open(input_file_name, "r+")
print()
print("---------------------------------------")
print("THE FILE CONTENTS ARE")
print("---------------------------------------")
print_file(infile)
print("---------------------------------------")
count_lines(infile)
print("---------------------------------------")
input_string = input("Please enter the word or string of words you want to remove from the text file: ")
print("---------------------------------------")
char_count(infile, input_string)
print("---------------------------------------")
print("THE NEW FILE CONTENTS ARE")
print_output(infile)
print("---------------------------------------")
infile.close()
def print_file(infile):
infile.seek(0)
allLines = infile.readlines()
for line in allLines:
text = line.rstrip()
print(text)
def count_lines(infile):
infile.seek(0)
allLines = infile.readlines()
count = 0
char = " "
for line in allLines :
text = line.rstrip()
while char != "":
char = infile.read(1)
count = count + 1
print("THE NUMBER OF LINES IS: %d " % count)
def char_count(infile, input_string) :
count = 0
infile.seek(0)
allLines = infile.readlines()
infile.seek(0)
for line in allLines:
while input_string in line:
line = line.replace(input_string, "")
count = count + 1
text = line.rstrip()
infile.write(text)
print("NUMBER OF OCCURRENCES REMOVED IS: %d" % count)
def print_output(infile):
infile.seek(0)
allLines = infile.readlines()
for line in allLines:
text = line.rstrip()
print(text)
main()
您必须先截断文件以获得所需的输出
def main():
input_file_name = input("Please Enter the name of your text file: ")
infile = open(input_file_name, "r+")
print()
print("---------------------------------------")
print("THE FILE CONTENTS ARE")
print("---------------------------------------")
print_file(infile)
print("---------------------------------------")
count_lines(infile)
print("---------------------------------------")
input_string = input("Please enter the word or string of words you want to remove from the text file: ")
print("---------------------------------------")
char_count(infile, input_string)
print("---------------------------------------")
print("THE NEW FILE CONTENTS ARE")
print_output(infile)
print("---------------------------------------")
infile.close()
def print_file(infile):
infile.seek(0)
allLines = infile.readlines()
for line in allLines:
text = line.rstrip()
print(text)
def count_lines(infile):
infile.seek(0)
allLines = infile.readlines()
count = 0
char = " "
for line in allLines :
text = line.rstrip()
while char != "":
char = infile.read(1)
count = count + 1
print("THE NUMBER OF LINES IS: %d " % count)
def char_count(infile, input_string) :
count = 0
infile.seek(0)
allLines = infile.readlines()
infile.seek(0)
infile.truncate() #Empty your file first to rewrite it
for line in allLines:
while input_string in line:
line = line.replace(input_string, "")
count = count + 1
text = line.rstrip()
if(text != ""):
infile.write(text + "\n") #To write in multiple lines
print("NUMBER OF OCCURRENCES REMOVED IS: %d" % count)
def print_output(infile):
infile.seek(0)
allLines = infile.readlines()
for line in allLines:
text = line.rstrip()
print(text)
main()
谢谢!我完全忘了在char_count结尾处为文本设置条件,我以前在那里有.truncate(),但它位于错误的位置。不客气,如果您对答案满意,请不要忘记接受答案