[英]python reading text file
我有一個文本文件,我需要每列,最好是字典或列表,格式為:
N ID REMAIN VERS
2 2343333 bana twelve
3 3549287 moredp twelve
3 9383737 hinsila twelve
3 8272655 hinsila eight
我努力了:
crs = open("file.txt", "r")
for columns in ( raw.strip().split() for raw in crs ):
print columns[0]
結果='超出索引錯誤'
還嘗試過:
crs = csv.reader(open(file.txt", "r"), delimiter=',', quotechar='|', skipinitialspace=True)
for row in crs:
for columns in row:
print columns[3]
這似乎是將每個字符串作為列讀取,而不是每個“字”
我想得到四列,即:
2
2343333
bana
twelve
分成單獨的詞典或列表
任何幫助都很棒,謝謝!
這對我來說很好:
>>> crs = open("file.txt", "r")
>>> for columns in ( raw.strip().split() for raw in crs ):
... print columns[0]
...
N
2
3
3
3
如果要將列轉換為行,請使用zip
。
>>> crs = open("file.txt", "r")
>>> rows = (row.strip().split() for row in crs)
>>> zip(*rows)
[('N', '2', '3', '3', '3'),
('ID', '2343333', '3549287', '9383737', '8272655'),
('REMAIN', 'bana', 'moredp', 'hinsila', 'hinsila'),
('VERS', 'twelve', 'twelve', 'twelve', 'eight')]
如果您有空行,請在使用zip之前對其進行過濾。
>>> crs = open("file.txt", "r")
>>> rows = (row.strip().split() for row in crs)
>>> zip(*(row for row in rows if row))
[('N', '2', '3', '3', '3'), ('ID', '2343333', '3549287', '9383737', '8272655'), ('REMAIN', 'bana', 'moredp', 'hinsila', 'hinsila'), ('VERS', 'twelve', 'twelve', 'twelve', 'eight')]
>>> with open("file.txt") as f:
... c = csv.reader(f, delimiter=' ', skipinitialspace=True)
... for line in c:
... print(line)
...
['N', 'ID', 'REMAIN', 'VERS', ''] #that '' is for leading space after columns.
['2', '2343333', 'bana', 'twelve', '']
['3', '3549287', 'moredp', 'twelve', '']
['3', '9383737', 'hinsila', 'twelve', '']
['3', '8272655', 'hinsila', 'eight', '']
或者,老式的方式:
>>> with open("file.txt") as f:
... [line.split() for line in f]
...
[['N', 'ID', 'REMAIN', 'VERS'],
['2', '2343333', 'bana', 'twelve'],
['3', '3549287', 'moredp', 'twelve'],
['3', '9383737', 'hinsila', 'twelve'],
['3', '8272655', 'hinsila', 'eight']]
並獲取列值:
>>> l
[['N', 'ID', 'REMAIN', 'VERS'],
['2', '2343333', 'bana', 'twelve'],
['3', '3549287', 'moredp', 'twelve'],
['3', '9383737', 'hinsila', 'twelve'],
['3', '8272655', 'hinsila', 'eight']]
>>> {l[0][i]: [line[i] for line in l[1:]] for i in range(len(l[0]))}
{'ID': ['2343333', '3549287', '9383737', '8272655'],
'N': ['2', '3', '3', '3'],
'REMAIN': ['bana', 'moredp', 'hinsila', 'hinsila'],
'VERS': ['twelve', 'twelve', 'twelve', 'eight']}
with open("path\sample1.csv") as f:
for line in f:
print line
//逐行讀取文件
只需使用列表列表
import csv
columns = [[] for _ in range(4)] # 4 columns expected
with open('path', rb) as f:
reader = csv.reader(f, delimiter=' ')
for row in reader:
for i, col in enumerate(row):
columns[i].append(col)
或者如果列數需要動態增長:
import csv
columns = []
with open('path', rb) as f:
reader = csv.reader(f, delimiter=' ')
for row in reader:
while len(row) > len(columns):
columns.append([])
for i, col in enumerate(row):
columns[i].append(col)
最后,您可以使用以下方式打印列:
for i, col in enumerate(columns, 1):
print 'List{}: {{{}}}'.format(i, ','.join(col))
這個怎么樣?
f = open("file.txt")
for i in f:
k = i.split()
for j in k:
print j
你可以使用這樣的列表理解:
with open("split.txt","r") as splitfile:
for columns in [line.split() for line in splitfile]:
print(columns)
然后,您將使用2d數組,允許您按照自己喜歡的方式對其進行分組。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.