导入
文本转换为小写和大写
学习如何在 Python 中应用小写转换、大写转换以及 Unicode 编码技术。
import pandas as pd
df = pd.read_csv('reviews.csv') df['review_text'] = df['review_text'].str.lower() print(df['review_text'])
import pandas as pd
df = pd.read_csv('reviews.csv') df['author_name'] = df['author_name'].str.upper() print(df['author_name'])
示例：非ASCII字符和变音符号
import pandas as pd import unicodedata
pd.set_option('display.max_columns', None)
df = pd.read_csv('reviews-fr.csv')
def unicode_case_transform(text):
return ''.join(unicodedata.normalize('NFKC', char) for char in text).lower()
df['review_text'] = df['review_text'].apply(unicode_case_transform)
print(df)