将 csv 作为坐标导入 python

Question

我是 python 的新手，现在需要使用“with...open...as”将给定的 csv 文件导入 pycharm，这是 csv 文件 enter image description here

我想要的输出是 [(0,1),(0,6),(1,7),...]

请问有人可以建议怎么写吗？

Answer 1

试试这个：

from csv import reader
dataset = []    # Initialize an empty array so we can append elements into it.
with open('import-csv-as-coordinates-to-python.csv', newline='') as csvfile:    # Open the csv file for reading.
    csvreader = reader(csvfile, delimiter=',')  # Initialize the csv reader from the file.
    for rowid, row in enumerate(csvreader): # Go through every row in the list.
        if rowid == 0:   # This row contains the fields to the data, we can ignore it.
            continue    # Continue onto the next row.
        dataset.append((row[1], row[2],))   # Add a tuple consisting of x, y to the list dataset.
print(dataset)  # Output the dataset to make sure it worked.

您可以在此处找到 csv 模块的文档](https://docs.python.org/3/library/csv.html)。这是官方 built-in 模块。

如果您愿意，您也可以通过为文件.readlines()中的每个 line 调用 line.split(',') 来自己解析 csv，就像这样。

dataset = []
with open('import-csv-as-coordinates-to-python.csv', newline='') as csvfile:
    for rowid, row in enumerate(csvfile.readlines()):
        row = row.strip().split(',')
        if rowid == 0:
            continue
        dataset.append((row[1], row[2],))
print(dataset)

Answer 2

这确实是重复的，但答案很简单：

# cat file.csv
id,x,y
1,0,1
2,0,6
3,1,7

# python -c "import pandas as pd;df=pd.read_csv('file.csv',sep=',');print(df.head());"
   id  x  y
0   1  0  1
1   2  0  6
2   3  1  7

# python -c "import pandas as pd;df=pd.read_csv('file.csv',sep=',',names=['x','y']);print(df[1:].values.tolist());"
[['0', '1'], ['0', '6'], ['1', '7']]

# python -c "import pandas as pd;df=pd.read_csv('file.csv',sep=',',names=['x','y']);print(list(zip(df['x'],df['y']))[1:]);"
[('0', '1'), ('0', '6'), ('1', '7')]

将 csv 作为坐标导入 python

Import csv as coordinates to python

python

csv

coordinates