$\"\"$
\nPython \u662f\u8fd1\u5341\u5e74\u6765\u5174\u8d77\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5e76\u4e14\u88ab\u8bc1\u660e\u662f\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u7684\u8bed\u8a00\u3002\u6211\u7528 Python \u6784\u5efa\u4e86\u5f88\u591a\u5e94\u7528\u7a0b\u5e8f\uff0c\u4ece\u4ea4\u4e92\u5f0f\u5730\u56fe\u5230\u533a\u5757\u94fe\u3002Python \u6709\u5f88\u591a\u7279\u6027\uff0c\u521d\u5b66\u8005\u5f88\u96be\u4e00\u5f00\u59cb\u5c31\u638c\u63e1\u6240\u6709\u7684\u7279\u6027\u3002
\n\u5373\u4f7f\u4f60\u662f\u4e00\u4e2a\u4ece\u5176\u4ed6\u8bed\u8a00\uff08\u5982 C \u6216 MATLAB\uff09\u8f6c\u6362\u8fc7\u6765\u7684\u7a0b\u5e8f\u5458\uff0c\u7528\u66f4\u9ad8\u62bd\u8c61\u7ea7\u522b\u7684 Python \u7f16\u5199\u4ee3\u7801\u7edd\u5bf9\u662f\u53e6\u4e00\u79cd\u4f53\u9a8c\u3002\u56de\u987e\u8d77\u6765\uff0c\u6709\u5f88\u591a Python \u7279\u6027\u5982\u679c\u6211\u80fd\u65e9\u70b9\u77e5\u9053\uff0c\u80af\u5b9a\u80fd\u5c11\u8d70\u4e0d\u5c11\u5f2f\u8def\u3002\u73b0\u5728\u6211\u60f3\u8981\u91cd\u70b9\u4ecb\u7ecd\u5176\u4e2d\u4e94\u4e2a\u6700\u91cd\u8981\u7684\u7279\u6027\u3002<\/p>\n

1.\u7406\u89e3 List\u2014\u2014\u538b\u7f29\u4ee3\u7801<\/strong><\/div>\n
\u5f88\u591a\u4eba\u4f1a\u5c06 lambda\u3001map \u548c filter \u4f5c\u4e3a Python \u7684\u300c\u6280\u5de7\u300d\uff0c\u6bcf\u4e2a\u521d\u5b66\u8005\u90fd\u5e94\u8be5\u5b66\u4e60\u8fd9\u4e9b\u6280\u5de7\u3002\u867d\u7136\u6211\u76f8\u4fe1\u5b83\u4eec\u662f\u6211\u4eec\u5e94\u8be5\u638c\u63e1\u7684\u7279\u6027\uff0c\u4f46\u6211\u53d1\u73b0\u7531\u4e8e\u7f3a\u4e4f\u7075\u6d3b\u6027\uff0c\u5b83\u4eec\u5728\u5927\u591a\u6570\u65f6\u5019\u5e76\u4e0d\u7279\u522b\u6709\u7528\u3002
\nLambda \u662f\u4e00\u79cd\u5728\u4e00\u884c\u4e2d\u7ec4\u5408\u51fd\u6570\u4ee5\u4f9b\u4e00\u6b21\u6027\u4f7f\u7528\u7684\u65b9\u6cd5\u3002\u5982\u679c\u51fd\u6570\u88ab\u591a\u6b21\u8c03\u7528\uff0c\u6027\u80fd\u5c06\u53d7\u5230\u5f71\u54cd\u3002\u53e6\u4e00\u65b9\u9762\uff0cmap \u5c06\u51fd\u6570\u5e94\u7528\u4e8e\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u800c filter \u5c06\u83b7\u53d6\u6ee1\u8db3\u7528\u6237\u5b9a\u4e49\u6761\u4ef6\u7684\u96c6\u5408\u4e2d\u5143\u7d20\u7684\u5b50\u96c6\u3002<\/p>\n
add_func = lambda z: z ** 2 \r\n \r\nis_odd = lambda z: z%2 == 1 \r\n \r\nmultiply = lambda x,y: x*y \r\n \r\naList = list(range(10)) \r\n \r\nprint(aList) \r\n \r\n# [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] \r\n<\/pre>\n
Anastase Maragos \u53d1\u8868\u5728 Unsplash \u6742\u5fd7\u4e0a\u7684\u7167\u7247
\n\u5217\u8868\u7406\u89e3\u662f\u4e00\u79cd\u7b80\u6d01\u800c\u7075\u6d3b\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u7528\u7075\u6d3b\u7684\u8868\u8fbe\u5f0f\u548c\u6761\u4ef6\u4ece\u5176\u4ed6\u5217\u8868\u521b\u5efa\u5217\u8868\u3002\u5b83\u662f\u7531\u65b9\u62ec\u53f7\u6784\u9020\u7684\uff0c\u5b83\u6709\u4e00\u4e2a\u8868\u8fbe\u5f0f\u6216\u4e00\u4e2a\u51fd\u6570\uff0c\u53ea\u6709\u5f53\u5143\u7d20\u6ee1\u8db3\u67d0\u4e2a\u6761\u4ef6\u65f6\uff0c\u8be5\u8868\u8fbe\u5f0f\u6216\u51fd\u6570\u624d\u5e94\u7528\u4e8e\u5217\u8868\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u3002\u5b83\u8fd8\u53ef\u4ee5\u5d4c\u5957\u6765\u5904\u7406\u5d4c\u5957\u5217\u8868\uff0c\u5e76\u4e14\u6bd4\u4f7f\u7528 map \u548c filter \u7075\u6d3b\u5f97\u591a\u3002<\/p>\n
# Syntax of list comprehension \r\n[ expression(x) for x in aList if optional_condition(x) ] \r\n \r\nprint(list(map(add_func, aList))) \r\n \r\nprint([x ** 2 for x in aList]) \r\n \r\n# [0, 1, 4, 9, 16, 25, 36, 49, 64, 81] \r\n \r\n# [0, 1, 4, 9, 16, 25, 36, 49, 64, 81] \r\n \r\nprint(list(filter(is_odd, aList))) \r\n \r\nprint([x for x in aList if x%2 == 1]) \r\n \r\n# [1, 3, 5, 7, 9] \r\n \r\n# [1, 3, 5, 7, 9]<\/pre>\n
2.\u5217\u8868\u5faa\u73af<\/strong><\/div>\n
Python \u5141\u8bb8\u4f7f\u7528\u8d1f\u7d22\u5f15\uff0c\u5176\u4e2d Altruts [-1]\uff1d= Altrue[LeN\uff08Listor\uff09-1 ]\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528 a list[-2] \u7b49\u83b7\u5f97\u5217\u8868\u4e2d\u7684\u5012\u6570\u7b2c\u4e8c\u4e2a\u5143\u7d20\u3002
\n\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528\u8bed\u6cd5 aList[start:end:step] \u5bf9\u5217\u8868\u8fdb\u884c\u5207\u7247\uff0c\u5176\u4e2d\u5305\u542b\u8d77\u59cb\u5143\u7d20\uff0c\u4f46\u4e0d\u5305\u542b\u7ed3\u675f\u5143\u7d20\u3002\u56e0\u6b64\uff0caList[2:5] \u7684\u7ed3\u679c\u662f [2\uff0c3\uff0c4]\u3002\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528 a list[\uff1a\uff1a-1] \u6765\u53cd\u8f6c\u5217\u8868\uff0c\u6211\u53d1\u73b0\u8fd9\u79cd\u6280\u672f\u975e\u5e38\u4f18\u96c5\u3002<\/p>\n
Martin Shreder \u53d1\u8868\u5728 Unsplash \u6742\u5fd7\u4e0a\u7684\u7167\u7247
\n\u5217\u8868\u4e5f\u53ef\u4ee5\u5206\u89e3\u6210\u5355\u72ec\u7684\u5143\u7d20\uff0c\u6216\u8005\u4f7f\u7528\u661f\u53f7\u5c06\u5143\u7d20\u548c\u5b50\u5217\u8868\u6df7\u5408\u3002<\/p>\n
a, b, c, d = aList[0:4]\r\n\r\nprint(f'a = {a}, b = {b}, c = {c}, d = {d}')\r\n\r\n# a = 0, b = 1, c = 2, d = 3\r\n\r\na, *b, c, d = aList\r\n\r\nprint(f'a = {a}, b = {b}, c = {c}, d = {d}')\r\n\r\n# a = 0, b = [1, 2, 3, 4, 5, 6, 7], c = 8, d = 9<\/pre>\n
3.\u538b\u7f29\u548c\u679a\u4e3e\uff1afor \u5faa\u73af<\/strong><\/div>\n
Zip \u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u8be5\u8fed\u4ee3\u5668\u805a\u5408\u6765\u81ea\u591a\u4e2a\u5217\u8868\u7684\u5143\u7d20\u3002\u5b83\u5141\u8bb8\u5728 for \u5faa\u73af\u4e2d\u5e76\u884c\u904d\u5386\u5217\u8868\u5e76\u5e76\u884c\u6392\u5e8f\u3002\u5b83\u53ef\u4ee5\u7528\u661f\u53f7\u6765\u89e3\u538b\u7f29\u3002<\/p>\n
numList = [0, 1, 2] \r\n \r\nengList = ['zero', 'one', 'two'] \r\n \r\nespList = ['cero', 'uno', 'dos'] \r\n \r\nprint(list(zip(numList, engList, espList))) \r\n \r\n# [(0, 'zero', 'cero'), (1, 'one', 'uno'), (2, 'two', 'dos')] \r\n \r\nfor num, eng, esp in zip(numList, engList, espList): \r\n \r\nprint(f'{num} is {eng} in English and {esp} in Spanish.') \r\n \r\n# 0 is zero in English and cero in Spanish. \r\n \r\n# 1 is one in English and uno in Spanish. \r\n \r\n# 2 is two in English and dos in Spanish. \r\n \r\nEng = list(zip(engList, espList, numList)) \r\n \r\nEng.sort() # sort by engList \r\n \r\na, b, c = zip(*Eng) \r\n \r\nprint(a) \r\n \r\nprint(b) \r\n \r\nprint(c) \r\n \r\n# ('one', 'two', 'zero') \r\n \r\n# ('uno', 'dos', 'cero') \r\n \r\n# (1, 2, 0)<\/pre>\n
5 \u4e2a\u8d8a\u65e9\u77e5\u9053\u8d8a\u597d\u7684 Python \u7279\u6027
\nErol Ahmed \u53d1\u8868\u5728 Unsplash \u6742\u5fd7\u4e0a\u7684\u7167\u7247
\n\u679a\u4e3e\u4e00\u5f00\u59cb\u53ef\u80fd\u770b\u8d77\u6765\u6709\u70b9\u5413\u4eba\uff0c\u4f46\u5728\u8bb8\u591a\u60c5\u51b5\u4e0b\u5b83\u662f\u975e\u5e38\u65b9\u4fbf\u7684\u3002\u5b83\u662f\u4e00\u4e2a\u7ecf\u5e38\u5728 for \u5faa\u73af\u4e2d\u4f7f\u7528\u7684\u81ea\u52a8\u8ba1\u6570\u5668\uff0c\u4e0d\u9700\u8981\u5728 for \u5faa\u73af\u4e2d\u521b\u5efa\u548c\u521d\u59cb\u5316\u8ba1\u6570\u5668\u53d8\u91cf by counter=0 \u548c counter+=1\u3002\u679a\u4e3e\u548c zip \u662f\u6784\u9020 for \u5faa\u73af\u65f6\u6700\u5f3a\u5927\u7684\u4e24\u4e2a\u5de5\u5177\u3002<\/p>\n
upperCase = ['A', 'B', 'C', 'D', 'E', 'F'] \r\n \r\nlowerCase = ['a', 'b', 'c', 'd', 'e', 'f'] \r\n \r\nfor i, (upper, lower) in enumerate(zip(upperCase, lowerCase), 1): \r\n \r\n print(f'{i}: {upper} and {lower}.') \r\n \r\n# 1: A and a. \r\n \r\n# 2: B and b. \r\n \r\n# 3: C and c. \r\n \r\n# 4: D and d. \r\n \r\n# 5: E and e. \r\n \r\n# 6: F and f.<\/pre>\n
4.\u751f\u6210\u5668\uff1a\u5185\u5b58\u6548\u7387<\/strong><\/div>\n
\u5f53\u6211\u4eec\u6253\u7b97\u5bf9\u5927\u91cf\u6570\u636e\u8fdb\u884c\u8ba1\u7b97\uff0c\u4f46\u5e0c\u671b\u907f\u514d\u540c\u65f6\u5206\u914d\u6240\u6709\u7ed3\u679c\u6240\u9700\u7684\u5185\u5b58\u65f6\uff0c\u4f1a\u4f7f\u7528\u751f\u6210\u5668\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b83\u4eec\u4f1a\u52a8\u6001\u751f\u6210\u503c\uff0c\u800c\u4e0d\u4f1a\u5c06\u4ee5\u524d\u7684\u503c\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u56e0\u6b64\u6211\u4eec\u53ea\u80fd\u5bf9\u5b83\u4eec\u8fdb\u884c\u4e00\u6b21\u8fed\u4ee3\u3002
\n\u5b83\u4eec\u901a\u5e38\u7528\u4e8e\u8bfb\u53d6\u5927\u6587\u4ef6\u6216\u4f7f\u7528\u5173\u952e\u5b57 yield \u751f\u6210\u65e0\u9650\u5e8f\u5217\u3002\u6211\u7ecf\u5e38\u53d1\u73b0\u5b83\u5728\u6211\u7684\u5927\u591a\u6570\u6570\u636e\u79d1\u5b66\u9879\u76ee\u4e2d\u5f88\u6709\u7528\u3002<\/p>\n
def gen(n): # an infinite sequence generator that generates integers >= n \r\n \r\n while True: \r\n \r\n yield n \r\n \r\n n += 1 \r\n \r\nG = gen(3) # starts at 3 \r\n \r\nprint(next(G)) # 3 \r\n \r\nprint(next(G)) # 4 \r\n \r\nprint(next(G)) # 5 \r\n \r\nprint(next(G)) # 6<\/pre>\n
5.\u865a\u62df\u73af\u5883\uff1aisolation<\/strong><\/div>\n
\u5982\u679c\u4f60\u8bfb\u5b8c\u672c\u6587\u4e2d\u53ea\u8bb0\u5f97\u5176\u4e2d\u4e00\u6761\uff0c\u90a3\u4e48\u5e94\u8be5\u662f\u865a\u62df\u73af\u5883\u7684\u4f7f\u7528\u3002<\/p>\n
Matthew Kwong \u53d1\u5e03\u5728 Unsplash \u4e0a\u7684\u7167\u7247
\nPython \u5e94\u7528\u7a0b\u5e8f\u901a\u5e38\u4f7f\u7528\u5f88\u591a\u4e0d\u540c\u7684\u5305\uff0c\u8fd9\u4e9b\u5305\u6765\u4e0d\u540c\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u5177\u6709\u590d\u6742\u7684\u4f9d\u8d56\u5173\u7cfb\u3002\u4e0d\u540c\u7684\u5e94\u7528\u7a0b\u5e8f\u662f\u4f7f\u7528\u7279\u5b9a\u7684\u5e93\u8bbe\u7f6e\u5f00\u53d1\u7684\uff0c\u5176\u4e2d\u7684\u7ed3\u679c\u4e0d\u80fd\u4f7f\u7528\u5176\u4ed6\u5e93\u7248\u672c\u590d\u5236\u3002\u4e0d\u5b58\u5728\u4e00\u6b21\u5b89\u88c5\u5c31\u6ee1\u8db3\u6240\u6709\u5e94\u7528\u8981\u6c42\u7684\u60c5\u51b5\u3002<\/p>\n
conda create -n venv pip python=3.7 # select python version \r\nsource activate venv \r\n... \r\nsource deactivate<\/pre>\n
\u56e0\u6b64\uff0c\u4e3a\u6bcf\u4e2a\u5e94\u7528\u7a0b\u5e8f\u521b\u5efa\u72ec\u7acb\u7684\u72ec\u7acb\u865a\u62df\u73af\u5883 venv \u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u8fd9\u53ef\u4ee5\u4f7f\u7528 pip \u6216 conda \u6765\u5b8c\u6210\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Python \u662f\u8fd1\u5341\u5e74\u6765\u5174\u8d77\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u5e76\u4e14\u88ab\u8bc1\u660e\u662f\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u7684\u8bed\u8a00\u3002\u6211\u7528 Python \u6784\u5efa\u4e86\u5f88\u591a\u5e94\u7528\u7a0b\u5e8f […]<\/p>\n","protected":false},"author":1469,"featured_media":168777,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-168774","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/168774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/1469"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=168774"}],"version-history":[{"count":6,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/168774\/revisions"}],"predecessor-version":[{"id":168901,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/168774\/revisions\/168901"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/168777"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=168774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=168774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=168774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}