![\"python\u5982\u4f55\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u5e93\"](\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25101114\/e9c7bba7-c95d-48ed-805b-2d1d23d1c684.webp\")
<\/p>\n<\/p>\n
Python\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u5e93\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u4f7f\u7528SQLite\u6570\u636e\u5e93\u3001\u4f7f\u7528Pandas\u5e93\u3001\u4f7f\u7528\u6587\u4ef6\u64cd\u4f5c\u6a21\u5757\u3001\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u7b49\u3002<\/strong>\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u8fd9\u4e9b\u65b9\u6cd5\u8fdb\u884c\u6587\u4ef6\u6570\u636e\u5e93\u7ba1\u7406\u3002<\/p>\n<\/p>\n SQLite\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u5d4c\u5165\u5f0f\u6570\u636e\u5e93\uff0c\u652f\u6301\u5927\u90e8\u5206SQL\u6807\u51c6\uff0c\u540c\u65f6\u6613\u4e8e\u96c6\u6210\u5230Python\u9879\u76ee\u4e2d\u3002Python\u5185\u7f6e\u7684 SQLite\u662fPython\u6807\u51c6\u5e93\u7684\u4e00\u90e8\u5206\uff0c\u65e0\u9700\u5355\u72ec\u5b89\u88c5\u3002\u53ea\u9700\u5728\u4ee3\u7801\u4e2d\u5bfc\u5165 <\/code><\/pre>\n<\/p>\n \u9996\u5148\u9700\u8981\u521b\u5efa\u6216\u8fde\u63a5\u5230\u4e00\u4e2aSQLite\u6570\u636e\u5e93\u6587\u4ef6\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528SQL\u547d\u4ee4\u5728\u6570\u636e\u5e93\u4e2d\u521b\u5efa\u8868\uff1a<\/p>\n<\/p>\n c.execute('''CREATE TABLE IF NOT EXISTS files<\/p>\n (id INTEGER PRIMARY KEY, name TEXT, content BLOB)''')<\/p>\n conn.commit()<\/p>\n <\/code><\/pre>\n<\/p>\n \u5c06\u6587\u4ef6\u5185\u5bb9\u63d2\u5165\u5230\u6570\u636e\u5e93\u4e2d\uff1a<\/p>\n<\/p>\n with open(file_path, 'rb') as f:<\/p>\n file_data = f.read()<\/p>\n c.execute("INSERT INTO files (name, content) VALUES (?, ?)", (file_path, file_data))<\/p>\n conn.commit()<\/p>\n insert_file('example.txt')<\/p>\n <\/code><\/pre>\n<\/p>\n \u4ece\u6570\u636e\u5e93\u4e2d\u67e5\u8be2\u6587\u4ef6\u5e76\u5c06\u5176\u4fdd\u5b58\u5230\u672c\u5730\uff1a<\/p>\n<\/p>\n c.execute("SELECT name, content FROM files WHERE id=?", (file_id,))<\/p>\n row = c.fetchone()<\/p>\n if row:<\/p>\n with open(output_path, 'wb') as f:<\/p>\n f.write(row[1])<\/p>\n retrieve_file(1, 'output_example.txt')<\/p>\n <\/code><\/pre>\n<\/p>\n Pandas\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u548c\u5206\u6790\u5e93\uff0c\u9002\u7528\u4e8e\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e\u3002\u53ef\u4ee5\u4f7f\u7528Pandas\u5e93\u6765\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u5e93\uff0c\u5c24\u5176\u662fCSV\u6587\u4ef6\u3002<\/p>\n<\/p>\n \u9996\u5148\u9700\u8981\u5b89\u88c5Pandas\u5e93\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u7136\u540e\u5728\u4ee3\u7801\u4e2d\u5bfc\u5165Pandas\u5e93\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u4f7f\u7528Pandas\u8bfb\u53d6CSV\u6587\u4ef6\uff1a<\/p>\n<\/p>\n print(df.head())<\/p>\n <\/code><\/pre>\n<\/p>\n \u53ef\u4ee5\u5bf9\u6570\u636e\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\uff0c\u5982\u7b5b\u9009\u3001\u6392\u5e8f\u3001\u5206\u7ec4\u7b49\uff1a<\/p>\n<\/p>\n filtered_df = df[df['column_name'] > 10]<\/p>\n sorted_df = df.sort_values(by='column_name')<\/p>\n grouped_df = df.groupby('column_name').mean()<\/p>\n <\/code><\/pre>\n<\/p>\n \u5c06\u5904\u7406\u540e\u7684\u6570\u636e\u4fdd\u5b58\u5230\u65b0\u7684CSV\u6587\u4ef6\u4e2d\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n Python\u7684\u5185\u7f6e\u6587\u4ef6\u64cd\u4f5c\u6a21\u5757\uff08\u5982 import shutil<\/p>\n from pathlib import Path<\/p>\n <\/code><\/pre>\n<\/p>\n \u521b\u5efa\u65b0\u7684\u76ee\u5f55\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u5c06\u6587\u4ef6\u79fb\u52a8\u5230\u65b0\u7684\u4f4d\u7f6e\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u590d\u5236\u6587\u4ef6\u5230\u65b0\u7684\u4f4d\u7f6e\uff1a<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n \u5220\u9664\u6587\u4ef6\u548c\u76ee\u5f55\uff1a<\/p>\n<\/p>\n os.rmdir('new_directory')<\/p>\n <\/code><\/pre>\n<\/p>\n \u9664\u4e86\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u6765\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u5e93\uff0c\u5982SQLAlchemy\u3001Django ORM\u3001TinyDB\u7b49\u3002<\/p>\n<\/p>\n SQLAlchemy\u662f\u4e00\u4e2aPython SQL\u5de5\u5177\u5305\u548c\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\u5668\uff08ORM\uff09\uff0c\u53ef\u4ee5\u7b80\u5316\u6570\u636e\u5e93\u64cd\u4f5c\u3002<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n from sqlalchemy.ext.declarative import declarative_base<\/p>\n from sqlalchemy.orm import sessionmaker<\/p>\n <\/code><\/pre>\n<\/p>\n class File(Base):<\/p>\n __tablename__ = 'files'<\/p>\n id = Column(Integer, primary_key=True)<\/p>\n name = Column(String)<\/p>\n content = Column(LargeBinary)<\/p>\n engine = create_engine('sqlite:\/\/\/example.db')<\/p>\n Base.metadata.create_all(engine)<\/p>\n <\/code><\/pre>\n<\/p>\n session = Session()<\/p>\n def insert_file(file_path):<\/p>\n with open(file_path, 'rb') as f:<\/p>\n file_data = f.read()<\/p>\n new_file = File(name=file_path, content=file_data)<\/p>\n session.add(new_file)<\/p>\n session.commit()<\/p>\n insert_file('example.txt')<\/p>\n <\/code><\/pre>\n<\/p>\n file_record = session.query(File).filter_by(id=file_id).first()<\/p>\n if file_record:<\/p>\n with open(output_path, 'wb') as f:<\/p>\n f.write(file_record.content)<\/p>\n retrieve_file(1, 'output_example.txt')<\/p>\n <\/code><\/pre>\n<\/p>\n TinyDB\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684NoSQL\u6570\u636e\u5e93\uff0c\u9002\u7528\u4e8e\u5c0f\u578b\u9879\u76ee\u3002<\/p>\n<\/p>\n <\/code><\/pre>\n<\/p>\n <\/code><\/pre>\n<\/p>\n db.insert({'name': 'example.txt', 'content': 'This is an example file content.'})<\/p>\n <\/code><\/pre>\n<\/p>\n result = db.search(File.name == 'example.txt')<\/p>\n print(result)<\/p>\n <\/code><\/pre>\n<\/p>\n Python\u63d0\u4f9b\u4e86\u591a\u79cd\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u5e93\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528SQLite\u6570\u636e\u5e93\u3001\u4f7f\u7528Pandas\u5e93\u3001\u4f7f\u7528\u6587\u4ef6\u64cd\u4f5c\u6a21\u5757\u3001\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u7b49\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u70b9\u548c\u9002\u7528\u573a\u666f\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u65e0\u8bba\u662f\u5904\u7406\u7ed3\u6784\u5316\u6570\u636e\u8fd8\u662f\u7ba1\u7406\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\uff0cPython\u90fd\u80fd\u63d0\u4f9b\u5f3a\u5927\u7684\u652f\u6301\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u9ad8\u6548\u5730\u5b8c\u6210\u6587\u4ef6\u6570\u636e\u5e93\u7ba1\u7406\u4efb\u52a1\u3002<\/p>\n<\/p>\n \u5982\u4f55\u4f7f\u7528Python\u8fde\u63a5\u548c\u64cd\u4f5c\u6587\u4ef6\u6570\u636e\u5e93\uff1f<\/strong> Python\u4e2d\u6709\u54ea\u4e9b\u5e38\u7528\u7684\u6587\u4ef6\u6570\u636e\u5e93\u7c7b\u578b\uff1f<\/strong> \u5982\u4f55\u5728Python\u4e2d\u5904\u7406\u6587\u4ef6\u6570\u636e\u5e93\u7684\u4e8b\u52a1\uff1f<\/strong>\u4e00\u3001\u4f7f\u7528SQLite\u6570\u636e\u5e93<\/h3>\n<\/p>\n
sqlite3<\/code>\u6a21\u5757\u53ef\u4ee5\u8f7b\u677e\u5730\u4e0eSQLite\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n<\/p>\n1. \u5b89\u88c5\u548c\u5bfc\u5165sqlite3\u6a21\u5757<\/h4>\n<\/p>\n
sqlite3<\/code>\u6a21\u5757\uff1a<\/p>\n<\/p>\nimport sqlite3<\/p>\n2. \u8fde\u63a5\u6570\u636e\u5e93<\/h4>\n<\/p>\n
conn = sqlite3.connect('example.db')<\/p>\n3. \u521b\u5efa\u8868<\/h4>\n<\/p>\n
c = conn.cursor()<\/p>\n4. \u63d2\u5165\u6570\u636e<\/h4>\n<\/p>\n
def insert_file(file_path):<\/p>\n5. \u67e5\u8be2\u6570\u636e<\/h4>\n<\/p>\n
def retrieve_file(file_id, output_path):<\/p>\n\u4e8c\u3001\u4f7f\u7528Pandas\u5e93<\/h3>\n<\/p>\n
1. \u5b89\u88c5\u548c\u5bfc\u5165Pandas<\/h4>\n<\/p>\n
pip install pandas<\/p>\nimport pandas as pd<\/p>\n2. \u8bfb\u53d6CSV\u6587\u4ef6<\/h4>\n<\/p>\n
df = pd.read_csv('example.csv')<\/p>\n3. \u64cd\u4f5c\u6570\u636e<\/h4>\n<\/p>\n
# \u7b5b\u9009\u6570\u636e<\/p>\n\u6392\u5e8f\u6570\u636e<\/strong><\/h2>\n
\u5206\u7ec4\u6570\u636e<\/strong><\/h2>\n
4. \u4fdd\u5b58\u6570\u636e<\/h4>\n<\/p>\n
filtered_df.to_csv('filtered_example.csv', index=False)<\/p>\n\u4e09\u3001\u4f7f\u7528\u6587\u4ef6\u64cd\u4f5c\u6a21\u5757<\/h3>\n<\/p>\n
os<\/code>\u3001shutil<\/code>\u3001pathlib<\/code>\uff09\u53ef\u4ee5\u5e2e\u52a9\u7ba1\u7406\u6587\u4ef6\u6570\u636e\u5e93\u3002\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u7ba1\u7406\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u6587\u4ef6\u548c\u76ee\u5f55\u3002<\/p>\n<\/p>\n1. \u5bfc\u5165\u6587\u4ef6\u64cd\u4f5c\u6a21\u5757<\/h4>\n<\/p>\n
import os<\/p>\n2. \u521b\u5efa\u76ee\u5f55<\/h4>\n<\/p>\n
os.makedirs('new_directory', exist_ok=True)<\/p>\n3. \u79fb\u52a8\u6587\u4ef6<\/h4>\n<\/p>\n
shutil.move('example.txt', 'new_directory\/example.txt')<\/p>\n4. \u590d\u5236\u6587\u4ef6<\/h4>\n<\/p>\n
shutil.copy('example.txt', 'new_directory\/example_copy.txt')<\/p>\n5. \u5220\u9664\u6587\u4ef6\u548c\u76ee\u5f55<\/h4>\n<\/p>\n
os.remove('new_directory\/example_copy.txt')<\/p>\n\u56db\u3001\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93<\/h3>\n<\/p>\n
1. \u4f7f\u7528SQLAlchemy<\/h4>\n<\/p>\n
\u5b89\u88c5\u548c\u5bfc\u5165SQLAlchemy<\/h5>\n<\/p>\n
pip install sqlalchemy<\/p>\nfrom sqlalchemy import create_engine, Column, Integer, String, LargeBinary<\/p>\n\u521b\u5efa\u6570\u636e\u5e93\u548c\u8868<\/h5>\n<\/p>\n
Base = declarative_base()<\/p>\n\u63d2\u5165\u6570\u636e<\/h5>\n<\/p>\n
Session = sessionmaker(bind=engine)<\/p>\n\u67e5\u8be2\u6570\u636e<\/h5>\n<\/p>\n
def retrieve_file(file_id, output_path):<\/p>\n2. \u4f7f\u7528TinyDB<\/h4>\n<\/p>\n
\u5b89\u88c5\u548c\u5bfc\u5165TinyDB<\/h5>\n<\/p>\n
pip install tinydb<\/p>\nfrom tinydb import TinyDB, Query<\/p>\n\u521b\u5efa\u6570\u636e\u5e93\u548c\u63d2\u5165\u6570\u636e<\/h5>\n<\/p>\n
db = TinyDB('db.json')<\/p>\n\u67e5\u8be2\u6570\u636e<\/h5>\n<\/p>\n
File = Query()<\/p>\n\u4e94\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
\u4f7f\u7528Python\u8fde\u63a5\u6587\u4ef6\u6570\u636e\u5e93\u901a\u5e38\u53ef\u4ee5\u901a\u8fc7SQLite\u5e93\u6765\u5b9e\u73b0\u3002SQLite\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u5e93\uff0c\u6587\u4ef6\u5b58\u50a8\u5728\u672c\u5730\uff0c\u975e\u5e38\u9002\u5408\u5c0f\u578b\u9879\u76ee\u548c\u5e94\u7528\u7a0b\u5e8f\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528sqlite3<\/code>\u6a21\u5757\u6765\u521b\u5efa\u8fde\u63a5\u3001\u6267\u884c\u67e5\u8be2\u3001\u63d2\u5165\u6570\u636e\u4ee5\u53ca\u7ba1\u7406\u4e8b\u52a1\u7b49\u64cd\u4f5c\u3002\u901a\u8fc7\u7b80\u5355\u7684SQL\u8bed\u53e5\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u7ba1\u7406\u6570\u636e\u3002<\/p>\n
Python\u652f\u6301\u591a\u79cd\u6587\u4ef6\u6570\u636e\u5e93\u7c7b\u578b\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662fSQLite\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u9009\u9879\uff0c\u5982TinyDB\u548cZODB\u7b49\u3002TinyDB\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u6587\u6863\u578b\u6570\u636e\u5e93\uff0c\u9002\u5408\u5c0f\u578b\u5e94\u7528\u3002\u800cZODB\u5219\u662f\u4e00\u4e2a\u5bf9\u8c61\u6570\u636e\u5e93\uff0c\u5141\u8bb8\u60a8\u76f4\u63a5\u5b58\u50a8Python\u5bf9\u8c61\uff0c\u9002\u5408\u66f4\u590d\u6742\u7684\u5e94\u7528\u9700\u6c42\u3002\u6839\u636e\u9879\u76ee\u7684\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u6587\u4ef6\u6570\u636e\u5e93\u7c7b\u578b\u81f3\u5173\u91cd\u8981\u3002<\/p>\n
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