这个用Python写的代码是什么？ Python中[::-1]这个代码是什么意思？
python\u4ee3\u7801\u7528\u4ec0\u4e48\u5199\u5bf9\u4e8e\u65b0\u624b\u800c\u8a00\uff0c\u5b66\u4e86\u5927\u6982\u7684\u8bed\u6cd5\uff0c\u4e03\u4e03\u516b\u516b\u7684\u5386\u53f2\u3001\u6982\u5ff5\u3001\u77e5\u8bc6\uff0c\u7136\u800c\u6700\u76f4\u63a5\u7684\u4e00\u4e2a\u95ee\u9898\u5374\u65e0\u4eba\u89e3\u7b54\uff1a\u5230\u5e95\u8981\u7528\u4ec0\u4e48\u8f6f\u4ef6\u3001\u4ec0\u4e48\u73af\u5883\u6765\u5199python\uff1f\u6bd4\u5982.m\u6587\u4ef6\u53ef\u4ee5\u7528matlab\u5199\uff0cjava\u53ef\u4ee5\u7528Eclipse\u5199\uff0cC\u8bed\u8a00\u53ef\u4ee5\u7528VC\u7b49\u8f6f\u4ef6\u5199\u3002\u90a3\u4e48Python\u7528\u4ec0\u4e48\u5199\u5462\uff1f
\u548cC\u8bed\u8a00\u4e00\u6837\uff0c\u5f53\u7136\u4f60\u53ef\u4ee5\u76f4\u63a5\u5728\u7535\u8111\u4e0a\u5f00\u4e2a\u9ed1\u6846\u5199\uff0c\u4e5f\u53ef\u50cfhtml\u4e00\u6837\u7528\u8bb0\u4e8b\u672c\u5199\uff0c\u4f46\u662f\u6ca1\u6709\u53ef\u89c6\u5316\u3001\u4fbf\u5229\u5316\u7684\u7f16\u8bd1\u8f6f\u4ef6\uff0c\u663e\u7136\u4e0d\u7b26\u5408\u5f53\u4ee3\u7a0b\u5e8f\u5458\u7684\u4e2a\u6027\u561b\u3002\u6240\u4ee5\u8fd9\u91cc\u63a8\u8350\u4e0b\u6bd4\u8f83\u6d41\u884c\u7684\u4e00\u6b3e\uff1aAnaconda\u3002
\u6700\u65e9\u4e5f\u662f\u5176\u4ed6\u7ae5\u978b\u63a8\u8350\u7684\uff0c\u540e\u6765\u770b\u4e66\uff0c\u4f8b\u5982\u300aDeep Learning With Python\u300b\u91cc\u9762\uff0c\u6307\u5b9a\u7528\u7684\u7f16\u8bd1\u8f6f\u4ef6\u5c31\u662fAnaconda\u3002
\u63a8\u8350\u5b66\u4e60\u300apython\u6559\u7a0b\u300b
Anaconda\u6709\u8bb8\u591a\u4f18\u52bf\uff1a
Anaconda Navigator is a desktop graphical user interface (GUI) included in Anaconda? distribution that allows you to launch applications and easily manage conda packages, environments and channels without using command-line commands. Navigator can search for packages on Anaconda Cloud or in a local Anaconda Repository. It is available for Windows, macOS and Linux.
\u4e0b\u8f7d\u94fe\u63a5\uff1ahttps://www.anaconda.com/download/#macos
\u6253\u5f00\u540e\u754c\u9762\uff1a\uff08\u6211\u662f\u7528macOS\u7cfb\u7edf\u7684\uff09
\u7136\u540e\u4f60Launch\u90a3\u4e2aSpyder\u5c31\u53ef\u4ee5\u5199python\u5566\uff01
\u5c31\u662f\u8fd9\u4e48\u7b80\u5355\uff0c\u7136\u540e\u5c31\u53ef\u4ee5\u5728\u8fd9\u91cc\u5199\u5566\u3002
\u5f53\u7136\uff0c\u4f5c\u4e3a\u65b0\u65f6\u4ee3\u7684\u7801\u519c\uff0c\u4ee3\u7801\u4e3b\u8981\u662f\u9760copy\u5566\uff0ccopy\u8fdb\u6765\u8dd1\u5c31\u597d\u4e86\u561b\u3002
\u4e4b\u540e\u8981\u8dd1\u4ec0\u4e48\u9ad8\u7ea7\u70b9\u7684\u7a0b\u5e8f\uff0c\u518d\u81ea\u5df1\u6162\u6162\u63a2\u7d22\u5427\uff01
\u5f00\u59cb\u5728python\u7684\u6d77\u6d0b\u91cc\u9068\u6e38\u5427\uff01\uff01\uff01~
[::-1]\u662f\u5bf9\u5b57\u7b26\u4e32\u7684\u622a\u53d6\u64cd\u4f5c\uff0cstr[a\uff1ab]\u8868\u793a\u622a\u53d6\u5b57\u7b26\u4e32\u7684a\u5f00\u59cb\u7684\u4f4d\u7f6e\uff0cb\u8868\u793a\u7ed3\u675f\u4f4d\u7f6e\u3002b\u662f\u8d1f\u6570\uff0c\u8868\u793a\u53bb\u9664\u540e\u51e0\u4f4d\u3002
\u7531\u4e8ePython\u8bed\u8a00\u7684\u7b80\u6d01\u6027\u3001\u6613\u8bfb\u6027\u4ee5\u53ca\u53ef\u6269\u5c55\u6027\uff0c\u5728\u56fd\u5916\u7528Python\u505a\u79d1\u5b66\u8ba1\u7b97\u7684\u7814\u7a76\u673a\u6784\u65e5\u76ca\u589e\u591a\uff0c\u4e00\u4e9b\u77e5\u540d\u5927\u5b66\u5df2\u7ecf\u91c7\u7528Python\u6765\u6559\u6388\u7a0b\u5e8f\u8bbe\u8ba1\u8bfe\u7a0b\u3002
\u53d6\u524d3\u4e2a\u5143\u7d20\uff0c\u5229\u7528\u5207\u7247\u64cd\u4f5c\u5c31\u662f\u201cL[0:3]\u201d\u3002\u5982\u679c\u7b2c\u4e00\u4e2a\u7d22\u5f15\u662f0\uff0c\u8fd8\u53ef\u4ee5\u7701\u7565\u201cL[:3]\u201d\u3002
\u4e5f\u53ef\u4ee5\u4ece\u7d22\u5f151\u5f00\u59cb\uff0c\u53d6\u51fa2\u4e2a\u5143\u7d20\u51fa\u6765\uff0cL[1:3]\uff0c\u663e\u793a\u7684\u7ed3\u679c\u5c31\u662f\u201c['Sarah', 'Tracy']\u201d\u3002
\u7c7b\u4f3c\u7684\uff0c\u65e2\u7136Python\u652f\u6301L[-1]\u53d6\u5012\u6570\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u90a3\u4e48\u540c\u6837\u652f\u6301\u5012\u6570\u5207\u7247\uff0c\u8bd5\u8bd5\u201cL[-2:]\u201d\uff0c\u8fd4\u56de\u7684\u5c31\u662f\u201c['Bob', 'Jack']\u201d\uff0c\u8bb0\u4f4f\u5012\u6570\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u662f-1\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u5bf9\u4e8e\u5177\u6709\u5e8f\u5217\u7ed3\u6784\u7684\u6570\u636e\u6765\u8bf4\uff0c\u5207\u7247\u64cd\u4f5c\u7684\u65b9\u6cd5\u662f\uff1aconsequence[start_index: end_index: step]\u3002
1\u3001start_index\uff1a\u8868\u793a\u662f\u7b2c\u4e00\u4e2a\u5143\u7d20\u5bf9\u8c61\uff0c\u6b63\u7d22\u5f15\u4f4d\u7f6e\u9ed8\u8ba4\u4e3a0\uff1b\u8d1f\u7d22\u5f15\u4f4d\u7f6e\u9ed8\u8ba4\u4e3a -len(consequence)
2\u3001end_index\uff1a\u8868\u793a\u662f\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u5bf9\u8c61\uff0c\u6b63\u7d22\u5f15\u4f4d\u7f6e\u9ed8\u8ba4\u4e3a len(consequence)\uff0d1\uff1b\u8d1f\u7d22\u5f15\u4f4d\u7f6e\u9ed8\u8ba4\u4e3a -1\u3002
3\u3001step\uff1a\u8868\u793a\u53d6\u503c\u7684\u6b65\u957f\uff0c\u9ed8\u8ba4\u4e3a1\uff0c\u6b65\u957f\u503c\u4e0d\u80fd\u4e3a0\u3002
这个还是比较简单的。
首先需要知道怎样判断年份是否为闰年。这个函数可以判断：
然后，加上main函数（当然也可以不用main函数，不过这样格式更清晰），如下：
Python3代码：
Python2代码：
整理一下，整体代码如下：
Python3代码：
Python2代码：
代码完。测试通过。
代码：
a = eval(input(""))
b = eval(input(""))
n = (b-a)//4
if b / 4 == int(b / 4):
n += 1 #这里有缩进
print(n)
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绛旓細def getInteger(prompt, lowerlimit=0, upperlimit=None): while True: try: num = int(raw_input(prompt)) if num < lowerlimit: print "outof lower band", lowerlimit continue if upperlimit and upperlimit < num: print "outof upper band", upperlimit cont...
