列表（可能）到csv文件的字符串python

Question

繼我之前的question，因爲我無法得到滿意的答案。現在我有這樣的數據，不知道它究竟是

["'A','B','C'"]["'a1,a2','b1','c1'"]["'a2,a4','b3','ct'"] 

我想我的最終輸出被寫入到一個CSV文件如下圖所示。我怎樣才能做到這一點？

A  ,B ,C 
a1,a2 ,b1 ,c1 
a2,a4 ,b3 ,ct 

Answer 1

假設[ 「 'A'， 'B'， 'C'」] [ 「 'A1，A2'， 'B1'， 'C1'」] [「 'A2，A4'，」 B3' ，‘CT’「]是一個長的字符串作爲原來的職位似乎暗示，即：

"""["'A','B','C'"]["'a1,a2','b1','c1'"]["'a2,a4','b3','ct'"]""" 

然後將下面的代碼應工作：

# ORIGINAL STRING 
s = """["'A','B','C'"]["'a1,a2','b1','c1'"]["'a2,a4','b3','ct'"]""" 

# GET RID OF UNNECESSARY CHARACTERS FOR OUR CSV 
s = s.replace("][", "--") # temporary chars to help split into lines later on 
s = s.replace("[", "") 
s = s.replace("]", "") 
s = s.replace("\'", "") 
s = s.replace("\"", "") 

# SPLIT UP INTO A LIST OF LINES OF TEXT 
lines = s.split("--") 

# WRITE EACH LINE IN TURN TO A CSV FILE 
with open("myFile.csv", mode = "w") as textFile: 
    # mode = w  to override any other contents of an existing file, or 
    #    create a new one. 
    # mode = a  To append to an exising file 
    for line in lines: 
     textFile.write(line + str("\n")) 

Answer 2

的另一種方式，再次假定數據被編碼爲一個長字符串：

import ast 

# ORIGINAL STRING 
s = """["'A','B','C'"]["'a1,a2','b1','c1'"]["'a2,a4','b3','ct'"]""" 

# PARSE INTO A LIST OF LISTS WITH STRING ELEMENTS 
s2 = s.replace("][", "],[") 
s2 = ast.literal_eval(s2) 
s2 = [ast.literal_eval(s2[x][0]) for x in range(len(s2))] 

# WRITE EACH LIST AS A LINE IN THE CSV FILE      
with open("myFile.csv", mode = "w") as textFile: 
     # mode = w  to override any other contents of an existing file, or 
     #    create a new one. 
     # mode = a  To append to an exising file 
     for i in range(len(s2)): 
      line = ",".join(s2[i]) 
      textFile.write(line + str("\n")) 

Answer 3

由於給定的輸入不會被任何內置的數據結構接受，因此您需要將其轉換爲字符串或列表列表。在下面假設你的輸入是一個字符串。另外，您可以按照您的要求修改格式。

#!/usr/bin/python 

from ast import literal_eval 

def csv(li): 
    file_handle = open("test.csv", "w") 
    #stripping the outer double_quotes and splitting the list by commas 
    for outer in li: 
     temp = outer[0].strip("'") 
     temp = temp.split("',") 
     value = "" 
     #bulding a formatted string(change this as per your requirement 
     for inner in temp: 
      value += '{0: <10}'.format(inner.strip("'")) + '{0: >10}'.format(",") 
     value = value.strip(", ") 
     #writing the built string into the file 
     file_handle.write(value + "\n") 
    file_handle.close() 

#assuming your input as string 
def main(): 
    li_str = """["'A','B','C'"]["'a1,a2','b1','c1'"]["'a2,a4','b3','ct'"]""" 
    li = [] 
    start_pos, end_pos = 0, -1 
    #break each into a new list and appending it to li 
    while(start_pos != -1): 
     start_pos = li_str.find("[", end_pos+1) 
     if start_pos == -1: 
      break 
     end_pos = li_str.find("]", start_pos+1) 
     li.append(literal_eval(li_str[start_pos:end_pos+1])) 
    #li now conatins a list of lists i.e. same as the input 
    csv(li) 

if __name__=="__main__": 
    main()