[英]2D array/list in python
我試圖將csv讀入2D數組,但似乎卡住了。 以下代碼的任何幫助將不勝感激。
import sys, csv
rowColumn = []
rowColumn.append([])
rowColumn.append([])
with open('filelocation.csv', "r+") as inputFile:
fieldnames = ['col1','col2','col3','col4','col5','col6','col7','col8',]
reader = csv.reader(inputFile)
i1=-1
i2=0
for row in reader:
i1=i1+1
print(row)
for item in row:
#store item in 2D list/array
rowColumn[i1][i2].append(item)#error occurs here
i2=i1+1
工作代碼:
import sys, csv
rowColumn = []
rowColumn.append([])
rowColumn.append([])
with open('filelocation.csv', "r+") as inputFile:
reader = csv.reader(inputFile)
i1=-1
for row in reader:
i1+=1
i2=0
for item in row:
#store item in 2D list/array
rowColumn[i1][i2].append(item)
i2+=1
看來我的i2
變量位於錯誤的位置。
為了易於使用,很難擊敗大熊貓:
import pandas as pd
# Read CSV file into pandas dataframe df
df = pd.read_csv('filelocation.csv', index_col=False)
# Convert dataframe to python list via a numpy array
python_list = df.values.tolist()
您的問題出在最后一行:您使列號取決於行號。 嘗試這樣的事情:
for row in reader:
i1 += 1
print(row)
i2 = 0
for item in row:
#store item in 2D list/array
rowColumn[i1][i2].append(item)
i2 += 1
如果您以前沒看過,
我+ = 1
相當於
我=我+1
。
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