>>> print int('82a', 16)<\/pre>\n![\"py_int\"](\"http:\/\/ixyzero.com\/blog\/wp-content\/uploads\/2015\/01\/py_int.png\")
<\/a><\/p>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/209513\/convert-hex-string-to-int-in-python<\/a><\/li>\n
- http:\/\/www.quora.com\/How-can-I-convert-hex-to-decimal-in-Python<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/9210525\/how-do-i-convert-hex-to-decimal-in-python<\/a><\/li>\n<\/ul>\n
<\/p>\n
2.Python\u7684\u5185\u5efafind\u65b9\u6cd5<\/h5>\n
http:\/\/search.aol.com\/aol\/search?q=python+str+find<\/a><\/p>\nstring.find(s, sub[, start[, end]])<\/p>\n
Return the lowest index in s where the substring sub is found such that sub is wholly contained in s[start:end]. Return -1 on failure<\/span>. Defaults for start and end and interpretation of negative values is the same as for slices.<\/p><\/blockquote>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/www.thehelloworldprogram.com\/python\/python-string-methods\/<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/674764\/examples-for-string-find-in-python<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/2294493\/how-to-get-the-position-of-a-character-in-python<\/a><\/li>\n
- https:\/\/docs.python.org\/2\/library\/string.html#string.find<\/a><\/li>\n<\/ul>\n
<\/p>\n
3.Python\u4e2d\u7684in\u65b9\u6cd5\u548cstr.find()\u7684\u6bd4\u8f83<\/h5>\n
\u786e\u5b9a\u641c\u7d22\u5173\u952e\u5b57\uff1a<\/p>\n
http:\/\/search.aol.com\/aol\/search?q=Python+str+in+vs.+str.find<\/a><\/p>\n\u7ed3\u8bba\uff1a\u63a8\u8350\u4f7f\u7528in\u65b9\u6cd5<\/strong><\/span>\uff0c\u56e0\u4e3a\uff08\u4e00\u65b9\u9762\u4fbf\u4e8e\u8bfb\u5199\uff1b\u53e6\u4e00\u65b9\u9762\u6548\u7387\u66f4\u9ad8\uff09<\/p>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/18437798\/find-vs-in-operation-in-string-python<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/12905513\/python-in-keyword-efficiency<\/a><\/li>\n
- http:\/\/www.hacksparrow.com\/python-check-if-a-character-or-substring-is-in-a-string.html<\/a><\/li>\n<\/ul>\n
<\/p>\n
4.Python\u4e2d\u904d\u5386\u7684\u4e00\u4e9b\u56de\u987e<\/h5>\n
http:\/\/search.aol.com\/aol\/search?q=Python+traverse+step<\/a><\/p>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/2990121\/how-do-i-loop-through-a-python-list-by-twos<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/434287\/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks<\/a><\/li>\n<\/ul>\n
<\/p>\n
5.\u5728Python\u4e2d\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u6570\u7684\u5947\u5076\u6027<\/h5>\nif number % 2 == 0:\n print 'even number'\nelse:\n print 'odd number'<\/pre>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/13636640\/python-checking-odd-even-numbers-and-changing-outputs-on-number-size<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/14275118\/python-remove-odd-number-from-a-list<\/a><\/li>\n<\/ul>\n
<\/p>\n
6.Python\u7684len()\u51fd\u6570\u7684\u6548\u7387<\/h5>\n
http:\/\/search.aol.com\/aol\/search?q=python+len%28%29+efficiency<\/a><\/p>\n\u7ed3\u8bba\uff1aPython\u7684len()\u51fd\u6570\u662f\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u7684\u64cd\u4f5c\uff0c\u975e\u5e38\u5feb\u3002<\/span><\/p>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/699177\/python-do-python-lists-keep-a-count-for-len-or-does-it-count-for-each-call<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/8778691\/profiled-performance-of-lenset-vs-set-len-in-python-3<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/1115313\/cost-of-len-function<\/a><\/li>\n<\/ul>\n
\u62d3\u5c55\u94fe\u63a5\uff1a<\/h6>\n\n- https:\/\/www.ics.uci.edu\/~pattis\/ICS-33\/lectures\/complexitypython.txt<\/a><\/li>\n
- http:\/\/wiki.python.org\/moin\/TimeComplexity<\/a><\/li>\n<\/ul>\n
<\/p>\n
7.Python\u7684tuple\uff08\u5143\u7ec4\uff09<\/h5>\n
https:\/\/docs.python.org\/2\/tutorial\/datastructures.html#tuples-and-sequences<\/a><\/p>\n\n- Tuple \u662f\u4e0d\u53ef\u53d8 list\u3002 \u4e00\u65e6\u521b\u5efa\u4e86\u4e00\u4e2a tuple \u5c31\u4e0d\u80fd\u4ee5\u4efb\u4f55\u65b9\u5f0f\u6539\u53d8\u5b83\u3002<\/li>\n
- \u5b9a\u4e49 tuple \u4e0e\u5b9a\u4e49 list \u7684\u65b9\u5f0f\u76f8\u540c, \u9664\u4e86\u6574\u4e2a\u5143\u7d20\u96c6\u662f\u7528\u5c0f\u62ec\u53f7\u5305\u56f4\u7684\u800c\u4e0d\u662f\u65b9\u62ec\u53f7\u3002<\/li>\n
- Tuple \u7684\u5143\u7d20\u4e0e list \u4e00\u6837\u6309\u5b9a\u4e49\u7684\u6b21\u5e8f\u8fdb\u884c\u6392\u5e8f\u3002 Tuples \u7684\u7d22\u5f15\u4e0e list \u4e00\u6837\u4ece 0 \u5f00\u59cb, \u6240\u4ee5\u4e00\u4e2a\u975e\u7a7a tuple \u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u603b\u662f t[0]\u3002<\/li>\n
- \u8d1f\u6570\u7d22\u5f15\u4e0e list \u4e00\u6837\u4ece tuple \u7684\u5c3e\u90e8\u5f00\u59cb\u8ba1\u6570\u3002<\/li>\n
- \u4e0e list \u4e00\u6837\uff0c\u5206\u7247 (slice) \u4e5f\u53ef\u4ee5\u4f7f\u7528\u3002\u6ce8\u610f\u5f53\u5206\u5272\u4e00\u4e2a list \u65f6, \u4f1a\u5f97\u5230\u4e00\u4e2a\u65b0\u7684 list \uff1b\u5f53\u5206\u5272\u4e00\u4e2a tuple \u65f6\uff0c\u4f1a\u5f97\u5230\u4e00\u4e2a\u65b0\u7684 tuple\u3002<\/li>\n
- Tuple \u6ca1\u6709\u65b9\u6cd5\uff1a\u6ca1\u6709 append \u6216 extend \u65b9\u6cd5\u3001\u6ca1\u6709 remove \u6216 pop \u65b9\u6cd5\u3001\u6ca1\u6709 index \u65b9\u6cd5\u3001\u53ef\u4ee5\u4f7f\u7528 in \u6765\u67e5\u770b\u4e00\u4e2a\u5143\u7d20\u662f\u5426\u5b58\u5728\u4e8e tuple \u4e2d\u3002<\/li>\n<\/ol>\n
\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- Lesson 6 – Tuples, Lists, and Dictionaries<\/a><\/li>\n
- Python\u4e2dlist\u3001tuple\u3001dict\u533a\u522b<\/a><\/li>\n
- Python\u00a0tuple\u00a0\u5143\u7ec4\u8be6\u89e3<\/a><\/li>\n<\/ul>\n
\u62d3\u5c55\u94fe\u63a5\uff1a<\/h6>\n
Sequence Types \u2014 str<\/a>, unicode<\/a>, list<\/a>, tuple<\/a>, bytearray<\/a>, buffer<\/a>, xrange<\/a><\/p>\n <\/p>\n
8.Python\u7684\u51e0\u4e2a\u5e38\u7528\u7684\u5185\u7f6e\u65b9\u6cd5<\/h5>\n\n- https:\/\/docs.python.org\/2\/library\/string.html<\/a><\/li>\n
- https:\/\/docs.python.org\/2.7\/library\/stdtypes.html#str.split<\/a><\/li>\n<\/ul>\n
<\/p>\n
9.Python\u7684\u5feb\u901f\u8d4b\u503c<\/h5>\n\u89e3\u5305\uff08unpack\uff09\uff0c\u6279\u91cf\u8d4b\uff08\u4e0d\u540c\uff09\u503c\uff1a<\/h6>\n
Jan, Mar, May, Jul, Aug, Oct, Dec = range(0, 7)<\/p>\n
\u6279\u91cf\u8d4b\uff08\u76f8\u540c\u7684\uff09\u503c\uff1a<\/h6>\n
Jan = Mar = May = Jul = Aug = Oct = Dec = range(0,7)<\/p>\n
\u641c\u7d22\u5173\u952e\u5b57\uff1a<\/h6>\n
http:\/\/search.aol.com\/aol\/search?q=Python+assign+multiple+variables+to+same+value+at+once<\/a><\/p>\n\n- http:\/\/stackoverflow.com\/questions\/10857654\/python-assigning-multiple-variables-to-same-list-value<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/22587239\/if-python-assignments-dont-return-a-value-how-can-we-do-a-b-c-42<\/a><\/li>\n
- https:\/\/docs.python.org\/2\/tutorial\/introduction.html#numbers<\/a><\/li>\n
- http:\/\/www.faqs.org\/docs\/diveintopython\/odbchelper_multiassign.html<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/16348815\/python-assigning-multiple-variables-to-same-value-list-behavior<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/5272995\/python-assign-multiple-variables-at-once<\/a><\/li>\n
- http:\/\/anh.cs.luc.edu\/python\/hands-on\/3.1\/handsonHtml\/variables.html<\/a><\/li>\n<\/ul>\n
<\/p>\n
10.\u5982\u4f55\u5c06\u4e00\u4e2alist\u7b49\u5206\uff1f<\/h5>\n\u65b9\u6cd5\u4e00\uff1a<\/h6>\n
Here’s a generator that yields the chunks you want:<\/p>\n
def chunks(l, n):\n \"\"\" Yield successive n-sized chunks from l. \"\"\"\n for i in xrange(0, len(l), n):\n yield l[i:i+n]\n\nimport pprint\npprint.pprint(list(chunks(range(10, 75), 10)))\n#[[10, 11, 12, 13, 14, 15, 16, 17, 18, 19],\n# [20, 21, 22, 23, 24, 25, 26, 27, 28, 29],\n# [30, 31, 32, 33, 34, 35, 36, 37, 38, 39],\n# [40, 41, 42, 43, 44, 45, 46, 47, 48, 49],\n# [50, 51, 52, 53, 54, 55, 56, 57, 58, 59],\n# [60, 61, 62, 63, 64, 65, 66, 67, 68, 69],\n# [70, 71, 72, 73, 74]]<\/pre>\n\u65b9\u6cd5\u4e8c\uff1a<\/h6>\n
If you want something super simple:<\/p>\n
def chunks(l, n):\n if n < 1:\n n = 1\nreturn [l[i:i + n] for i in range(0, len(l), n)]<\/pre>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n
http:\/\/stackoverflow.com\/questions\/312443\/how-do-you-split-a-list-into-evenly-sized-chunks-in-python<\/a><\/p>\n <\/p>\n
11.Python\u4e2dset\u7684\u521d\u59cb\u5316<\/h5>\n\u641c\u7d22\u5173\u952e\u5b57\uff1a<\/h6>\n
http:\/\/search.aol.com\/aol\/search?q=python+inital+an+empty+set<\/a><\/p>\n\u77e5\u8bc6\u7eb2\u8981\uff1a<\/h6>\n\n[] = empty list<\/p>\n
() = empty tuple<\/p>\n
{} = empty dict<\/p>\n
set() = empty set<\/p>\n<\/blockquote>\n
No, there’s no literal syntax for the empty set. You have to write set().\u00a0\u5373\uff0cPython\u4e2dset\u7684\u521d\u59cb\u5316\u6ca1\u6709\u522b\u7684\u597d\u65b9\u6cd5\uff0c\u53ea\u80fd\u7528 set() \u65b9\u6cd5<\/span>\u3002<\/p>\nset\u4e2d\u7684\u4e00\u4e9b\u65b9\u6cd5\uff1a<\/h6>\nset.add(elem) #Add element elem to the set.\u5411set\u4e2d\u6dfb\u52a0\u5143\u7d20\nset.discard(elem) #Remove element elem from the set if it is present.\u79fb\u9664\u5143\u7d20\nset.clear() #Remove all elements from the set.\u79fb\u9664\u6240\u6709\u5143\u7d20\nunion() \/ intersection() \/ difference() \/ symmetric_difference() #\u4e00\u4e9b\u5176\u4ed6\u65b9\u6cd5<\/pre>\n\u53c2\u8003\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/6130374\/empty-set-literal-in-python<\/a><\/li>\n
- http:\/\/stackoverflow.com\/questions\/17373161\/using-curly-braces-to-initialize-set<\/a><\/li>\n<\/ul>\n
\u62d3\u5c55\u94fe\u63a5\uff1a<\/h6>\n\n- http:\/\/stackoverflow.com\/questions\/17429123\/how-to-join-two-sets-in-one-line-without-using<\/a><\/li>\n
- https:\/\/docs.python.org\/2\/library\/stdtypes.html#set-types-set-frozenset<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
1.\u5c06\u5341\u516d\u8fdb\u5236\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5341\u8fdb\u5236\u6570\u503c \u641c\u7d22\u5173\u952e\u5b57\uff1a http:\/\/search.aol.com\/aol\/sea […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7],"tags":[89,433,8,19,257],"class_list":["post-1798","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","tag-find","tag-in","tag-python","tag-tips","tag-tuple"],"views":2816,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/1798","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=1798"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/1798\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=1798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=1798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=1798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}