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在python中使用x和y值从两个csv文件创建单个csv

geo csv list python

Nic · 技术社区 · 7 年前

我正在尝试创建一个具有所有可能组合的csv(例如x1、y1;x1、y2;x1、y3;x2、y1;x2、y2;x2、y3…)。等)

import csv

inLatCSV = r"C:\data\Lat.csv"
inLongCSV = r"C:\data\Long.csv"
outCSV = r"C:\data\LatLong.csv"

with open(inLatCSV, 'r') as f:
  reader = csv.reader(f)
  list_Lat = list(reader)

with open(inLongCSV, 'r') as f:
   reader = csv.reader(f)
   list_Long = list(reader)

with open(outCSV, 'w') as myfile:
   for y in list_Lat:
       for x in list_Long:
            combVal = (y,x)
            #print (combVal)
            wr = csv.writer(myfile)
            wr.writerow(combVal)

2 回复 | 直到 7 年前

Uncle Ben Ben 7 年前

open

with open(my_csv, 'w', newline="") as myfile:
    combinations = [[y,x] for y in list_Lat for x in list_Long]
    wr = csv.writer(myfile)
    wr.writerows(combinations)

dashiell 7 年前

Pandas

import pandas as pd

lats = pd.read_csv("C:\data\Lat.csv",header=None)
lons = pd.read_csv("C:\data\Long.csv",header=None)

lats['_tmp'] = 1
lons['_tmp'] = 1

df = pd.merge(lats,lons,on='_tmp').drop('_tmp',axis=1)
df.to_csv('C:\data\LatLong.csv',header=False,index=False)

https://pandas.pydata.org/pandas-docs/version/0.20/merging.html