{"rsdb":{"rid":"395127","subhead":"","postdate":"0","aid":"272507","fid":"54","uid":"1","topic":"1","content":"

\u5728Python\u4e2d\u7684For\u5faa\u73af<\/strong><\/p>

Python\u4e2d\u7684for\u5faa\u73af\u8bed\u53e5\u6309\u987a\u5e8f\u904d\u5386\u4efb\u4f55\u5bf9\u8c61\uff0c\u5217\u8868\uff0c\u5b57\u7b26\u4e32\u7b49\u7684\u6210\u5458\u3002\u4e0e\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u76f8\u6bd4\uff0c\u5b83\u7684\u8bed\u6cd5\u66f4\u52a0\u7b80\u6d01\uff0c\u4e0d\u9700\u8981\u624b\u52a8\u5b9a\u4e49\u8fed\u4ee3\u6b65\u9aa4\u5e76\u5f00\u59cb\u8fed\u4ee3\u3002 \u5c3d\u7ba1\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u5176\u884c\u4e3a\u4e0e\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u76f8\u540c\uff08\u672c\u6587\u4e0d\u4f1a\u4ecb\u7ecd\uff09\u3002 \u60a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u8bf8\u5982continue\uff0cbreak\uff0cpass\u7b49\u8bed\u53e5\u5bf9for\u5faa\u73af\u8fdb\u884c\u4e00\u4e9b\u63a7\u5236\u3002\u4ee5\u4e0b\u662fPython\u4e2dfor\u5faa\u73af\u7684\u7b80\u5355\u793a\u4f8b\uff1a<\/p>

 >>> for a in range(10):
...  print(a)<\/p>

\u4e0a\u9762\u7684for\u5faa\u73af\u5c06\u6253\u5370\u4ece0\u52309\u7684\u5341\u4e2a\u6570\u5b57\u3002<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/p>

\u5217\u8868\u63a8\u5bfc\u5f0f\u53ea\u4e0d\u8fc7\u662f\u5728\u4e00\u884c\u8bed\u53e5\u4e2d\u7f16\u5199\u591a\u884cfor\u5faa\u73af\u7684\u4e00\u79cd\u7b80\u5199\u65b9\u6cd5\u3002\u4e0b\u9762\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\u793a\u4f8b\u5c06\u521b\u5efa\u4e00\u4e2a\u65b0\u5217\u8868[0\u30011\u30012\u30013\u30014\u30015\u30016\u30017\u30018\u30019]\uff0c\u5176\u4e2d\u5305\u542b\u6240\u6709\u7684\u201ca\u201d\u503c\u3002<\/p>

>>> numbers = [a for a in range(10)]
>>> print (numbers)<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u8bf7\u6ce8\u610f\uff0c\u5217\u8868\u63a8\u5bfc\u5f0f\u59cb\u7ec8\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u5217\u8868\uff0c\u5e76\u4e14\u4e0d\u4f1a\u4fee\u6539\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u7684\u539f\u59cb\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002 \u5178\u578b\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\u8868\u8fbe\u5f0f\u5fc5\u987b\u5177\u6709\u201c for\u201d\u5b50\u53e5\uff0c\u5e76\u4e14\u53ef\u4ee5\u540e\u63a5\u201c if\u201d\u548c\u201c else\u201d\u6761\u4ef6\u8bed\u53e5\u3002 \u5728\u4e0d\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u7684\u60c5\u51b5\u4e0b\uff0c\u4ee5\u4e0a\u793a\u4f8b\u5c06\u4ee5\u4ee5\u4e0b\u65b9\u5f0f\u7f16\u5199\uff1a<\/p>

>>> numbers = []
>>> for x in range(10):
...  numbers.append(x)
...
>>> print (numbers)<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u6027\u80fd\u548c\u53ef\u8bfb\u6027<\/strong><\/p>

\u5217\u8868\u63a8\u5bfc\u5f0f\u6bd4for\u5faa\u73af\u5feb\u3002 \u4f46\u662f\uff0c\u9664\u975e\u60a8\u8981\u904d\u5386\u6210\u5343\u4e0a\u4e07\u7684\u9879\u76ee\uff0c\u5426\u5219\u60a8\u4e0d\u4f1a\u6ce8\u610f\u5230\u6027\u80fd\u4e0a\u7684\u91cd\u5927\u6539\u8fdb\u3002 \u5c3d\u7ba1\u5217\u8868\u63a8\u5bfc\u5f0f\u4e3a\u5faa\u73af\u7f16\u5199\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u6cd5\uff0c\u4f46\u662f\u590d\u6742\u7684\u8868\u8fbe\u5f0f\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u8f83\u5dee\u548c\u5197\u957f\u3002 \u4fdd\u6301\u4ee3\u7801\u53ef\u8bfb\u6027\u5f88\u91cd\u8981\uff0c\u9664\u975e\u5b9e\u73b0\u7a0b\u5e8f\u7684\u7edd\u5bf9\u5fc5\u8981\u7684\u6027\u80fd\u662f\u6700\u9ad8\u3002<\/p>

\u793a\u4f8b\uff1a\u5bf9\u5b57\u5178\u548c\u96c6\u5408\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u8bed\u6cd5<\/strong><\/p>

Python\u5b57\u5178\u662f\u952e-\u503c\u5bf9\u4e2d\u5b9a\u4e49\u7684\u5143\u7d20\u7684\u96c6\u5408\uff0c\u800c\u96c6\u5408\u662f\u4e0d\u5141\u8bb8\u91cd\u590d\u7684\u552f\u4e00\u503c\u7684\u96c6\u5408\u3002\u5217\u8868\u63a8\u5bfc\u5f0f\u4e5f\u53ef\u4ee5\u4e0ePython\u5b57\u5178\u548c\u96c6\u5408\u4e00\u8d77\u4f7f\u7528\u3002 \u8bed\u6cd5\u7565\u6709\u4e0d\u540c\uff0c\u60a8\u73b0\u5728\u5fc5\u987b\u4f7f\u7528\u82b1\u62ec\u53f7\uff0c\u800c\u4e0d\u662f\u5c06\u8868\u8fbe\u5f0f\u7528\u65b9\u62ec\u53f7\u62ec\u8d77\u6765\u3002 \u60a8\u8fd8\u5c06\u83b7\u5f97\u4e00\u4e2a\u65b0\u7684\u5b57\u5178\/\u96c6\u5408\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u3002<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u5982\u679c\u4e0d\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\uff08dictionary comprehensions\uff09\uff0c\u4ee3\u7801\u5c06\u5982\u4e0b\u6240\u793a\uff1a<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u7531\u4e8e\u96c6\u5408\u4e2d\u6ca1\u6709\u952e\u503c\u5bf9\uff0c\u56e0\u6b64\u53ef\u4ee5\u6309\u7167\u4e0e\u5217\u8868\u63a8\u5bfc\u5f0f\u76f8\u540c\u7684\u65b9\u5f0f\u5b9a\u4e49\u96c6\u5408\u7406\u89e3\u3002 \u552f\u4e00\u7684\u533a\u522b\u662f\u4f7f\u7528\u82b1\u62ec\u53f7\u3002<\/p>

\u793a\u4f8b\uff1a\u5217\u8868\u63a8\u5bfc\u5f0f\u4e2d\u7684\u591a\u4e2aFor\u5faa\u73af<\/strong><\/p>

\u4e0a\u9762\u63d0\u5230\u7684\u5217\u8868\u7406\u89e3\u793a\u4f8b\u662f\u57fa\u672c\u7684\uff0c\u5e76\u4f7f\u7528\u5355\u4e2a\u201c for\u201d\u8bed\u53e5\u3002 \u4e0b\u9762\u662f\u4e00\u4e2a\u4f7f\u7528\u591a\u4e2afor\u5faa\u73af\u548c\u6761\u4ef6\u201c if\u201d\u8bed\u53e5\u7684\u793a\u4f8b\u3002<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u8be5\u4ee3\u7801\u5c06\u663e\u793a['linux linuxidc', 'ubuntu uc', 'debian dell']\u4f5c\u4e3a\u8f93\u51fa\u3002 \u4e24\u4e2afor\u5faa\u73af\u904d\u5386\u201cos\u201d\u548c\u201csit\u201d\u5217\u8868\uff0c\u5e76\u4e14\u4e24\u4e2a\u5355\u8bcd\u7684\u9996\u5b57\u6bcd\u76f8\u540c\u65f6\uff0c\u5b83\u4eec\u7684\u6210\u5458\u4f7f\u7528\u7a7a\u683c\u8fde\u63a5\u5728\u4e00\u8d77\u3002 \u4e0d\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>

>>> os = ["linux", "ubuntu", "debian", "centos"]
>>> site = ["linuxidc", "uc", "dell", "python<\/a>"]
>>> mingchen = []
>>> for a in os:
...  for b in site:
...    if b.startswith(a[0]):
...      mingchen.append(a + " " + b)
...
>>> print (mingchen)<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u793a\u4f8b\uff1a\u5e26\u6709if-else\u5b50\u53e5\u7684\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/p>

\u4e0b\u9762\u7684\u793a\u4f8b\u5c06\u663e\u793a\u5217\u8868\u63a8\u5bfc\u5f0f\u4e2dif\u548celse\u8bed\u53e5\u7684\u7528\u6cd5\u3002<\/p>

>>> linux_list = [1, 2, 3, 4, 5]
>>> idc_list = [6, 7, 8, 9, 10]
>>> result = [True  if (a + b) % 2 == 0 else False for a in linux_list for b in idc_list]
>>> print (result)<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u5728\u904d\u5386\u4e24\u4e2a\u5217\u8868\u65f6\uff0c\u4e0a\u9762\u7684\u5217\u8868\u7406\u89e3\u68c0\u67e5\u8fd9\u5bf9\u5143\u7d20\u7684\u603b\u548c\u662f\u5426\u4e3a\u5076\u6570\u3002 \u8fd0\u884c\u4e0a\u9762\u7684\u4ee3\u7801\u5c06\u4e3a\u60a8\u663e\u793a[False, True, False, True, False, True, False, True, False, True, False, True, False, True, False, True, False, True, False, True, False, True, False, True, False]\u4f5c\u4e3a\u8f93\u51fa\u3002 \u4e0d\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\uff0c\u4ee3\u7801\u5982\u4e0b\u6240\u793a\uff1a<\/p>

>>> linux_list = [1, 2, 3, 4, 5]
>>> idc_list = [6, 7, 8, 9, 10]
>>> result = []
>>> for a in linux_list:
...  for b in idc_list:
...    if (a + b) % 2 == 0:
...      result.append(True)
...    else:
...      result.append(False)
...
>>> print (result)<\/p>

\"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List<\/p>

\u603b\u7ed3<\/p>

\u5217\u8868\u63a8\u5bfc\u5f0f\u63d0\u4f9b\u4e86\u4e00\u79cd\u7f16\u5199\u7b80\u6d01\u5faa\u73af\u8bed\u53e5\u7684\u597d\u65b9\u6cd5\u3002\u4f46\u662f\uff0c\u5982\u679c\u4f7f\u7528\u591a\u4e2a\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\uff0c\u5b83\u4eec\u53ef\u80fd\u5f88\u5feb\u53d8\u5f97\u590d\u6742\u548c\u96be\u4ee5\u7406\u89e3\u3002\u4e0d\u8fc7\u7f16\u5199\u663e\u5f0f\u3001\u53ef\u8bfb\u3001\u6613\u4e8e\u8c03\u8bd5\u7684\u4ee3\u7801\u662f\u4e00\u4e2a\u597d\u4e60\u60ef\uff0c\u800c\u4e0d\u662f\u8fc7\u5ea6\u4f7f\u7528\u7f29\u5199\u3002<\/p>","orderid":"0","title":"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List Comprehensions\uff09","smalltitle":"","mid":"0","fname":"linux\u7f16\u7a0b\u57fa\u7840","special_id":"0","bak_id":"0","info":"0","hits":"591","pages":"1","comments":"0","posttime":"2023-07-26 08:18:32","list":"1690330712","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"Python<\/A> List<\/A> Comprehensions<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"119.59.235.169","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"\u6df1\u5165\u7406\u89e3Python\u4e2d\u7684\u5217\u8868\u63a8\u5bfc\u5f0f\uff08List Comprehensions\uff09","lastview":"1716063889","digg_num":"814","digg_time":"1715789947","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}