String 如何使用.txt文件中的列表和行

我正在处理一个文本文件（现在称之为user.txt），希望能够跳过每行中的第一项[0]，在等式[3:4]中使用以下数字，然后从该特定行中吐出相等的答案，并将其添加到列表中每行[5]的末尾。但我正在努力跳过[0]，然后用我的等式继续，然后吐出我的答案。我是python新手，正在寻找关于如何实现这一点的好结构的建议。下面是我的user.txt列表示例

['Port', '1853282.679', '1673876.66', '1 ', '2']
['Bruns', '1963178.059', '1695301.229', '0 ', '1']
['Tops', '2092564.258', '1666785.835', '5 ', '6']
['Brave', '3464227.016', '1699924.786', '1 ', '1']
['Crew', '3056933.525', '1688585.272', '9 ', '3']
['Hann', '3180151.244', '1670897.027', '7 ', '3']
['Luke', '3403469.566', '1694894.58', '0 ', '1']
.......

---

如果您已经在阅读这些行，您可以像这样解析每一行：

line = "['Port', '1853282.679', '1673876.66', '1 ', '2']"
line = line[1:-1] # Line is now "'Port', '1853282.679', '1673876.66', '1 ', '2'"
line = line.split(',') # Line is now a list containing the former comma separated params

---

现在，您可以使用诸如

行[0]

，

行[1]

等参数。如果您已经在阅读这些行，您可以像这样解析每一行：

line = "['Port', '1853282.679', '1673876.66', '1 ', '2']"
line = line[1:-1] # Line is now "'Port', '1853282.679', '1673876.66', '1 ', '2'"
line = line.split(',') # Line is now a list containing the former comma separated params

---

现在，您可以使用诸如

行[0]

，

行[1]

等参数，尝试用代码逐字翻译您的需求：

#coding:utf-8

##I am working out of a text file (call it user.txt for now)
user_txt = ('''['Port', '1853282.679', '1673876.66', '1 ', '2']
['Bruns', '1963178.059', '1695301.229', '0 ', '1']
['Tops', '2092564.258', '1666785.835', '5 ', '6']
['Brave', '3464227.016', '1699924.786', '1 ', '1']
['Crew', '3056933.525', '1688585.272', '9 ', '3']
['Hann', '3180151.244', '1670897.027', '7 ', '3']
['Luke', '3403469.566', '1694894.58', '0 ', '1']'''
    .replace('[','')
    .replace(']','')
    .replace(' ','')
    .replace("'",''))
lines = user_txt.split('\n')
##and would like to be able to skip the first item [0] in each row,
rows = [line.split(',')[1:] for line in lines]
##use the following numbers in an equation [3:4],
equations = [int(row[2]) + int(row[3]) for row in rows]
##and then spit out my equated answer from that specific row
print equations
##and add it to the end of the row [5] for each individual line going down the list.
print [row + [int(row[2]) + int(row[3])] for row in rows]

---

Phil，试着用代码逐字翻译你的需求：

#coding:utf-8

##I am working out of a text file (call it user.txt for now)
user_txt = ('''['Port', '1853282.679', '1673876.66', '1 ', '2']
['Bruns', '1963178.059', '1695301.229', '0 ', '1']
['Tops', '2092564.258', '1666785.835', '5 ', '6']
['Brave', '3464227.016', '1699924.786', '1 ', '1']
['Crew', '3056933.525', '1688585.272', '9 ', '3']
['Hann', '3180151.244', '1670897.027', '7 ', '3']
['Luke', '3403469.566', '1694894.58', '0 ', '1']'''
    .replace('[','')
    .replace(']','')
    .replace(' ','')
    .replace("'",''))
lines = user_txt.split('\n')
##and would like to be able to skip the first item [0] in each row,
rows = [line.split(',')[1:] for line in lines]
##use the following numbers in an equation [3:4],
equations = [int(row[2]) + int(row[3]) for row in rows]
##and then spit out my equated answer from that specific row
print equations
##and add it to the end of the row [5] for each individual line going down the list.
print [row + [int(row[2]) + int(row[3])] for row in rows]

---

谢谢你的建议，这将工作，但我有一个txt文件有100行，我需要从txt文件拉。对从txt文件中提取有什么建议吗？谢谢你的建议，这会有用的，但是我有一个包含100行的txt文件，我需要从txt文件中提取。对从txt文件中提取有什么建议吗？