读取csv并操作
import pandas as pd
csv_path = "report.csv"
# 选择要读取的列的列名
# usecols可以选择要读取的列，不选的话就全读
df = pd.read_csv(csv_path, usecols=["patient_id", "report"])
# 要存放csv的dict
patient = dict()
# 通过index, row, df.iterrows()
for index, row in df.iterrows():
# row["列名"]可以选某一行的某一列内容
id = row["patient_id"]
report = str(row["report"])
if id not in patient.keys():
patient[id] = ""
patient[id] += report
写入数据结构到csv操作：
import csv
# data也可以是dict
data = []
with open('test.csv', 'w', newline='') as csvfile:
writer = csv.writer(csvfile)
for row in data:
writer.writerow(row)
