Python只读取文本文件的某些行
我有下面这样的文本文件,我想做的是读三行,以0开头,三行以1开头,以此类推,直到30-40。并希望将它们打印在同一行上。我怎样才能做到这一点?多谢各位Python只读取文本文件的某些行,python,Python,我有下面这样的文本文件,我想做的是读三行,以0开头,三行以1开头,以此类推,直到30-40。并希望将它们打印在同一行上。我怎样才能做到这一点?多谢各位 0 something 0 something2 0 something3 0 something4 0 something5 0 something6 1 something 1 something2 1 something3 1 something4 1 something5 1 something6 期望输出: 0 something s
0 something
0 something2
0 something3
0 something4
0 something5
0 something6
1 something
1 something2
1 something3
1 something4
1 something5
1 something6
期望输出:
0 something something2 something3
1 something something2 something3
试试这个:
with open('file.txt', mode = 'r') as f: # opens file
LIMIT = 3 # change this to however many you like
i = 0
output = []
while True:
line = f.readline().strip() # get rid of '/n' newlines
if line == '': # if line is empty / end of file
break
line = line.split() # get tuple of values
i = int(line[0]) # get number at start
try:
output[i] # check if output has starting number
except IndexError:
for i in range(len(output), i + 1):
output.append([]) # add until number reached
if len(output[i]) < LIMIT: # if length is smaller than limit
output[i].append(line[1]) # add the value
for i, j in enumerate(output):
print(i, *j) # print output
将open('file.txt',mode='r')作为f:#打开文件
LIMIT=3#将其更改为您喜欢的数量
i=0
输出=[]
尽管如此:
line=f.readline().strip()#去掉'/n'换行符
if line='':#if line为空/文件结尾
打破
line=line.split()#获取值的元组
i=int(第[0]行)#开始时获取编号
尝试:
输出[i]#检查输出是否有起始编号
除索引器外:
对于范围内的i(len(输出),i+1):
输出。追加([])#添加,直到达到数字
如果len(输出[i])