我试图让这个程序读取文本文件中的一个特定单词,但是结果只能是“1”。 为什么会出现这种情况?
import os
openfile = input('Enter the input file: ')
accumulator = 0
entry = "PMID"
if os.path.isfile(openfile):
file = open(openfile,'r')
for entry in file.readlines():
accumulator +=1
print('there are:',accumulator)
exit()
print('Input file not found.')
print('Please check the file name or the location of your input file.')
太谢谢你了!
问题是您正在for循环中调用exit()
。 这意味着在第一次迭代之后(当accumulator=1
),您将结束循环。 将此指令移出循环以使其正常工作。
import os
openfile = input('Enter the input file: ')
accumulator = 0
word = "PMID"
if os.path.isfile(openfile):
file = open(openfile,'r')
for entry in file.readlines():
accumulator +=1
print(f'There are {accumulator} occurences of "{word}" in {openfile}')
else:
print('Input file not found.')
print('Please check the file name or the location of your input
如果你想计算某个词的出现次数。。。
import os
openfile = input('Enter the input file: ')
accumulator = 0
word = "PMID"
if os.path.isfile(openfile):
file = open(openfile,'r')
for entry in file.readlines():
if word in entry:
accumulator +=1
print(f'There are {accumulator} occurences of "{word}" in {openfile}')
else:
print('Input file not found.')
print('Please check the file name or the location of your input file.')
您可以尝试如下操作:
for line in file.readlines():
accumulator += entry in line