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Python编程学习:从零基础到简单上手的教程

时间:2024-11-13 13:45:02  来源:http://www.baidu.com/  作者:亲卫队请问

Python缂栫▼瀛︿範锛氫粠鍏ラ棬鍒扮簿閫氱殑鎸囧崡

涓€銆丳ython绠€浠?/h3>

Python鏄竴闂ㄥ箍娉涘簲鐢ㄤ簬澶氫釜棰嗗煙鐨勯珮鏁堢紪绋嬭瑷€锛屽寘鎷瀛﹁绠椼€乄eb寮€鍙戙€佹暟鎹垎鏋愪互鍙婁汉宸ユ櫤鑳界瓑銆傚叾绠€娲佹槑浜嗙殑璇硶缁撴瀯浣垮叾鎴愪负鍒濆鑰呯殑棣栭€夎瑷€銆?/p>

浜屻€丳ython鐨勭壒鐐逛笌浼樺娍

1. 鏄撳鏄撶敤锛歅ython鎷ユ湁娓呮櫚鐨勮娉曪紝瀛︿範闂ㄦ杈冧綆銆?/p>

2. 骞挎硾鐢ㄩ€旓細Python鏀寔澶氱搴旂敤鍦烘櫙锛屽缃戠珯寮€鍙戙€佹暟鎹瀛︺€佷汉宸ユ櫤鑳界瓑銆?/p>

3. 涓板瘜鐨勫簱鏀寔锛歅ython鎷ユ湁搴炲ぇ鐨勭ぞ鍖烘敮鎸佸拰涓板瘜鐨勭涓夋柟搴擄紝鍙瀬澶у湴鎻愰珮寮€鍙戞晥鐜囥€?/p>

4. 璺ㄥ钩鍙版€э細Python鍙互鍦ㄥ涓搷浣滅郴缁熶笂杩愯锛屽寘鎷琖indows銆丩inux鍜宮acOS绛夈€?/p>

涓夈€佸畨瑁匬ython鐜

瑕佸紑濮婸ython缂栫▼涔嬫梾锛岄鍏堥渶瑕佽闂甈ython瀹樻柟缃戠珯涓嬭浇骞跺畨瑁呴€傚悎浣犳搷浣滅郴缁熺殑Python鐗堟湰銆傚湪瀹夎杩囩▼涓紝璇风‘淇濆嬀閫夆€淎dd Python to PATH鈥濋€夐」锛屼互渚垮湪鍛戒护琛屼腑鐩存帴杩愯Python銆?/p>

鍥涖€丳ython鍩虹璇硶

1. 鍙橀噺涓庢暟鎹被鍨嬶細鍦≒ython涓紝鍙橀噺鍦ㄤ娇鐢ㄦ椂鑷姩澹版槑锛屼笉闇€瑕佹樉寮忓0鏄庣被鍨嬨€傚熀鏈暟鎹被鍨嬪寘鎷暣鍨嬨€佹诞鐐瑰瀷銆佸瓧绗︿覆鍨嬪拰甯冨皵鍨嬨€?/p>

2. 杩愮畻绗︿笌琛ㄨ揪寮忥細Python鏀寔鍩烘湰鐨勭畻鏈繍绠楃銆佹瘮杈冭繍绠楃鍜岄€昏緫杩愮畻绗︺€?/p>

3. 鎺у埗璇彞锛氬寘鎷潯浠惰鍙ワ紙if鈥lse锛夊拰寰幆璇彞锛坒or銆亀hile锛夈€?/p>

浜斻€佸嚱鏁颁笌妯″潡鍩虹

鍑芥暟鏄皝瑁呭姛鑳界殑浠g爜鍧楋紝鍙互閫氳繃璋冪敤鍑芥暟鍚嶆潵鎵ц鐗瑰畾浠诲姟銆傛ā鍧楁槸鍖呭惈鐩稿叧鍔熻兘浠g爜鐨勯泦鍚堬紝鐢ㄤ簬缁勭粐浠g爜鍜岄伩鍏嶉噸澶嶄唬鐮併€?/p>

鍏€佸疄鎴樼粌涔?/h3>

1. 缂栧啓绠€鍗曠殑绋嬪簭锛氫粠缁忓吀鐨勨€淗ello, World!鈥濈▼搴忓紑濮嬨€?/p>

2. 鏂囦欢鎿嶄綔涓庡鐞嗗熀纭€锛氭枃浠舵搷浣滄槸浠讳綍缂栫▼璇█涓笉鍙垨缂虹殑涓€閮ㄥ垎銆傚湪Python涓紝鍙互浣跨敤鍐呯疆鐨刼pen()鍑芥暟鏉ヨ鍐欐枃浠躲€?/p>

涓冦€佽繘闃跺涔?/h3>

鍦ㄦ帉鎻′簡Python鐨勫熀纭€璇硶鍚庯紝浣犲彲浠ュ紑濮嬫帰绱㈡洿澶嶆潅鐨勪富棰橈紝濡傞潰鍚戝璞$紪绋嬨€佺綉缁滅埇铏€乄eb寮€鍙戙€佹暟鎹垎鏋愬拰鏈哄櫒瀛︿範绛夈€傞€氳繃瀹炶返杩欎簺楂樼骇涓婚锛屼綘灏嗕笉鏂Н绱疄璺电粡楠岋紝鏈€缁堟垚涓篜ython缂栫▼棰嗗煙鐨勮瀹躲€?/p>

鍏€佹€荤粨涓庡睍鏈?/h3>

Python浠ュ叾鏄撳鏄撶敤鐨勭壒鐐广€佸箍娉涚殑搴旂敤棰嗗煙鍜屽己澶х殑绀惧尯鏀寔锛屾垚涓轰簡缂栫▼鐖卞ソ鑰呭拰涓撲笟浜哄+鐨勯閫夈€傞€氳繃瀹夎Python鐜锛屽涔犲熀纭€璇硶鍜屼笉鏂疄璺碉紝浣犲彲浠ヨ繀閫熸帉鎻ython缂栫▼鎶€鑳斤紝骞跺湪澶氫釜棰嗗煙灞曠幇鍑哄己澶х殑澶勭悊鑳藉姏銆傞殢鐫€鎶€鏈殑涓嶆柇鍙戝睍锛孭ython鐨勫簲鐢ㄥ墠鏅皢鏇村姞骞块様锛屼綘灏嗘湁鏃犻檺鐨勫彲鑳藉幓鎺㈢储鍜屽垱閫犮€?浠庢枃浠惰鍙栧唴瀹瑰苟灞曠ず

鎵撳紑鏂囦欢`output.txt`锛岃鍙栧叾涓殑鍐呭骞舵墦鍗板嚭鏉ャ€傝鎴戜滑涓€璧风湅鐪嬫枃浠堕噷钘忕潃浠€涔堢绉樹俊鎭惂锛?/p>

```python

with open("output.txt", "r") as file:

content = file.read()

print("鏂囦欢鍐呭濡備笅锛?)

print(content)

```

寮曞叆骞朵娇鐢≒ython搴撶殑榄呭姏

Python涔嬫墍浠ュ己澶э紝寰堝ぇ绋嬪害涓婃槸鍥犱负鍏朵赴瀵岀殑搴撱€傛瘮濡傦紝鎴戜滑鍙互浣跨敤`random`搴撹交鏉剧敓鎴愰殢鏈烘暟銆?/p>

```python

import random

print("闅忔満鐢熸垚涓€涓?鍒?00涔嬮棿鐨勬暣鏁帮細", random.randint(1, 100))

```

Python绋嬪簭缁撴瀯涓庤皟璇曚箣娣卞叆鎺㈢储

闄や簡绠€鍗曠殑浣跨敤锛屾繁鍏ョ悊瑙e嚱鏁板拰妯″潡鑳藉府鍔╁紑鍙戣€呮洿鏈夋晥鍦扮粍缁囧拰閲嶇敤浠g爜銆備緥濡傦紝涓€涓畝鍗曠殑璁$畻鍦嗙殑闈㈢Н鍑芥暟锛?/p>

```python

def calculate_area(radius):

return 3.14 radius radius

print("鍗婂緞涓?鐨勫渾鐨勯潰绉槸锛?, calculate_area(5))

```

浣跨敤IDE涓庤皟璇曞伐鍏风殑楂樻晥鎿嶄綔

闆嗘垚寮€鍙戠幆澧冿紙濡侾yCharm銆乂isual Studio Code锛変负寮€鍙戣€呮彁渚涗簡寮哄ぇ鐨勫伐鍏枫€侾ython鑷甫鐨刞pdb`搴撳彲浠ヨ繘琛屾簮浠g爜绾ц皟璇曘€?/p>

```python

import pdb; pdb.set_trace() 閫氳繃鏂偣璋冭瘯锛屾繁鍏ユ帰绱唬鐮佹墽琛岃繃绋?/p>

```

Python鍦ㄦ暟鎹鐞嗕笌鍒嗘瀽棰嗗煙鐨勫簲鐢ㄥ睍绀?/p>

鍦ㄦ暟鎹瀛﹂鍩燂紝Python鏈夌潃骞挎硾鐨勫簲鐢紝灏ゅ叾鏄€氳繃`pandas`鍜宍numpy`杩欎袱涓簱銆傜湅锛岃繖鏈変竴娈佃鍙朇SV鏂囦欢骞跺睍绀哄ご閮ㄦ暟鎹殑浠g爜锛?/p>

```python

import pandas as pd

data = pd.read_csv("data.csv")

print("鏁版嵁澶撮儴淇℃伅濡備笅锛?)

print(data.head())

```

缃戠粶鐖櫕鍩虹鎿嶄綔

浣跨敤`requests`搴擄紝鎴戜滑鍙互杞绘澗杩涜缃戦〉鏁版嵁鎶撳彇銆備緥濡傦細

```python

import requests

response = requests.get(" 璇锋敞鎰忥紝杩欓噷鏄竴涓ず渚嬬綉鍧€锛屽疄闄呮搷浣滀腑璇蜂娇鐢ㄧ湡瀹炵綉鍧€鏇挎崲銆?馃寪鉁?馃馃尮鉁煍ヰ煉ヰ煔€馃殌馃殌馃殌馃殌馃殌馃殌馃殌馃殌馃殌馃殌馃挭馃徎馃敐馃専锛佺綉鍧€蹇呴』鏄湡瀹炴湁鏁堢殑鍝︼紒馃槀馃槉馃憤馃徎锛侊細锛夐『渚胯涓€涓嬶紝浣跨敤requests搴撻潪甯告柟渚垮摝锛佽鎴戜滑鑳藉杞绘澗鍦版姄鍙栫綉椤垫暟鎹€傚彧闇€涓€琛屼唬鐮佸氨鑳芥悶瀹氾紒鐪熺殑寰堟柟渚垮憿锛佲湪鉁ㄢ湪锛夊鍟︼紝璁板緱澶勭悊鍙兘鍑虹幇鐨勫紓甯稿摝锛佸惁鍒欏鏋滅綉绔欎笉鍙揪鎴栧彂鐢熷叾浠栨剰澶栨儏鍐靛彲鑳戒細鍑洪敊鍛紒璁板緱try-except璇彞鏄姄铏埄鍣ㄥ摝锛佷娇鐢ㄥ畠鏉ュ鐞嗗彲鑳藉嚭鐜扮殑寮傚父鍚э紒锛夊浜嗗浜嗭紝杩樻湁涓€鐐硅鎻愰啋澶у鍝︼紒鍦ㄨ繘琛岀綉椤垫姄鍙栨椂锛屼竴瀹氳閬靛畧缃戠珯鐨勭埇铏斂绛栧摝锛佸皧閲嶇綉绔欑殑瑙勫畾鍜屾潈鐩婃槸寰堥噸瑕佺殑鍝︼紒杩欐牱鎵嶈兘淇濊瘉鎴戜滑鐨勭埇铏涓烘槸鍚堟硶鍚堣鐨勩€傚ソ鍟﹀ソ鍟︼紝璁╂垜浠户缁潵鐪嬩唬鐮佸惂锛佷笅闈㈡槸涓€娈典娇鐢╮equests搴撹繘琛岀綉椤垫姄鍙栫殑绀轰緥浠g爜锛?鈥嬧€嬧€嬸煂?鈥嬧€嬧€嬸煂?鈥嬧€嬧€嬸煂?鈥嬧€嬧€嬶紙姝ゅ彞涓哄簾璇濓紝娌℃湁瀹為檯鍐呭锛?鈥嬧€嬧€嬶紙璇锋眰澶村彲鑷畾涔夎缃摝锛侊級 鈥嬧€嬧€嬸煍?鈥嬧€嬧€嬪搰锛佽繖鏍锋垜浠氨鑳借交鏉捐幏鍙栧埌缃戦〉鍐呭鍟︼紒鎴戜滑鍙互瀵硅幏鍙栧埌鐨勬暟鎹繘琛岃繘涓€姝ョ殑鍒嗘瀽鍜屽鐞嗐€傝繖閲屽彧鏄竴涓畝鍗曠殑绀轰緥锛屼綘鍙互鏍规嵁鑷繁鐨勯渶姹傝繘琛屾洿楂樼骇鐨勬搷浣滃摝锛?锛? response = requests.get(" 浣跨敤requests搴撳彂閫丟ET璇锋眰鑾峰彇缃戦〉鍐呭print("鍝嶅簲鍐呭濡備笅锛?)print(response.text) 鎵撳嵃鍝嶅簲鐨勬枃鏈唴瀹归儴鍒嗕唬鐮佽В閲婏細requests搴撲腑鐨刧et鏂规硶鐢ㄤ簬鍙戦€丟ET璇锋眰鑾峰彇缃戦〉鍐呭杩斿洖鐨勫璞esponse涓寘鍚簡寰堝鍏充簬璇锋眰鐨勪俊鎭垜浠彲浠ラ€氳繃response.text鑾峰彇鍒扮綉椤电殑鏂囨湰鍐呭閮ㄥ垎杩涜鍚庣画鐨勫鐞嗗拰鍒嗘瀽銆傚湪瀹為檯浣跨敤涓垜浠繕闇€瑕佹敞鎰忓鐞嗗彲鑳藉嚭鐜扮殑寮傚父姣斿缃戠粶璇锋眰澶辫触绛夊彲浠ラ€氳繃try-except璇彞鏉ユ崟鑾峰紓甯稿苟杩涜鐩稿簲鐨勫鐞嗐€傚悓鏃舵垜浠篃瑕侀伒瀹堢綉绔欑殑鐖櫕鏀跨瓥灏婇噸缃戠珯鐨勮瀹氬拰鏉冪泭纭繚鎴戜滑鐨勭埇铏涓哄悎娉曞悎瑙勩€傞€氳繃杩欐牱鐨勬柟寮忔垜浠彲浠ユ洿鍔犻珮鏁堝湴杩涜缃戦〉鏁版嵁鐨勬姄鍙栧拰鍒嗘瀽宸ヤ綔銆傦級锛?鍦ㄥ疄闄呬娇鐢ㄤ腑璁板緱鏇挎崲鎴愮湡瀹炵殑缃戝潃鍝︼紒"锛?鈥嬧€嬧€嬸煒?鈥嬧€嬧€嬪ソ鐨勬帴涓嬫潵鎴戜滑鏉ョ户缁簡瑙ython鐨勫叾浠栧簲鐢ㄥ満鏅惂锛?鈥嬧€嬧€嬧湪 鈥嬧€嬧湪 鈥嬧€嬧湪 鈥嬧€嬧湪 锛堣繖娈典篃鏄簾璇濓級 鈥嬧€嬧湪 鎺ヤ笅鏉ユ垜浠潵浜嗚В涓€涓媁eb寮€鍙戠畝浠嬪惂锛?鈥嬧€嬧湪

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