读取 CSV
54.3 读取 CSV
pd.read_csv('文件.csv', encoding='utf-8') 读表格文件。
df.head(n) 前 n 行；df.tail() 后 n 行；df.info() 列信息。
读写 CSV
# ========================================
# 示例：read_csv 与 to_csv
# ========================================
import pandas as pd
# 先创建并保存
df = pd.DataFrame({'name': ['A', 'B'], 'score': [90, 85]})
df.to_csv('scores.csv', index=False, encoding='utf-8-sig')
# 再读取
loaded = pd.read_csv('scores.csv', encoding='utf-8-sig')
print(loaded)
print(loaded.head())