import csv
impFileName = []
impFileName.append("file_1.csv")
impFileName.append("file_2.csv")
expFileName = "MasterFile.csv"
l = []
overWrite = False
comma = ","
for f in range(len(impFileName)):
with open(impFileName[f], "r") as impFile:
table = csv.reader(impFile, delimiter = comma)
for row in table:
data_1 = row[0]
data_2 = row[1]
data_3 = row[2]
data_4 = row[3]
data_5 = row[4]
data_6 = row[5]
dic = {"one":data_1, "two":data_2, "three":data_3, "four":data_4, "five":data_5, "six":data_6}
for i in range(len(l)):
if l[i]["one"] == data_1:
print("Data, where one = " + data_1 + " has been updated using the data from " + impFileName[f])
l[i] = dic
overWrite = True
break
if overWrite == False:
l.append(dic)
else:
overWrite = False
print(impFileName[f] + " has been added to the list 'l'")
with open(expFileName, "a") as expFile:
print("Master file now being created...")
for i in range(len(l)):
expFile.write(l[i]["one"] + comma + l[i]["two"] + comma + l[i]["three"] + comma + l[i]["four"] + comma + l[i]["five"] + comma + l[i]["six"] + "\r\n")
print("Process Complete")
该程序需要2个(或更多).csv文件并将每行的uniqueID(data_1)与所有其他行进行比较。如果它们匹配,则认为当前行是更新版本,因此将其覆盖。如果没有匹配,那么这是一个新的条目。csv文件末尾忽略“ r n”
我将每一行的数据存储在一个字典中,然后存储在列表“l”中。
一旦所有的文件都被处理完毕,我会以指定的格式输出列表“l”到“MasterFile.csv”。
---问题---
“File_1.csv”的最后一行和“File_2.csv”的第一行最终在输出文件的同一行上。我希望它继续新的路线。
--visual
...
data_1,data_2,data_3,data_4,data_5,data_6
data_1,data_2,data_3,data_4,data_5,data_6DATA_1,DATA_2,DATA_3,DATA_4,DATA_5,DATA_6
DATA_1,DATA_2,DATA_3,DATA_4,DATA_5,DATA_6
...
注意:有任何该.csv文件的无标题行。
我也试过这个只在“expFile.write”结尾处使用“\ n” - 结果相同
第一个文件的最后一行没有换行符,这并不罕见。您必须手动插入一个 –
当然,我将它们插入底部附近的“expFile.Write”行 - 在'写入'结尾处插入“\ r \ n”(“\ r”回车符,“\ n“换行)? – marmitegeek