Commit d0da19cf33d4435e68b0241efdc3f34601be97ee - luxu1011578034644 - (('Mo Repos',), {'htdigest_file': None, 'use_smarthttp': 0, 'require_browser_auth': 0, 'disable_push': 0, 'unauthenticated_push': 0, 'ctags

joyvan 6 years ago

3 changed file(s) with 135 addition(s) and 140 deletion(s). Raw diff Collapse all Expand all

+56

-58

01.01 python 基础.ipynb less more

33	33	"metadata": {},
34	34	"outputs": [],
35	35	"source": [
36		"print (\"hello world!\")"
	36	"print(\"hello world!\")"
37	37	]
38	38	},
39	39	{

148	148	"metadata": {},
149	149	"outputs": [],
150	150	"source": [
151		"print (min(2, 3, 4, 5))\n",
152		"print (max(2, 4, 3))"
	151	"print(min(2, 3, 4, 5))\n",
	152	"print(max(2, 4, 3))"
153	153	]
154	154	},
155	155	{

166	166	"metadata": {},
167	167	"outputs": [],
168	168	"source": [
169		"print (int(-3.32))"
	169	"print(int(-3.32))"
170	170	]
171	171	},
172	172	{

182	182	"metadata": {},
183	183	"outputs": [],
184	184	"source": [
185		"print (float(1))"
	185	"print(float(1))"
186	186	]
187	187	},
188	188	{

238	238	"outputs": [],
239	239	"source": [
240	240	"s = \"hello, world\"\n",
241		"print (s)"
	241	"print(s)"
242	242	]
243	243	},
244	244	{

248	248	"outputs": [],
249	249	"source": [
250	250	"s = 'hello, world'\n",
251		"print (s)"
	251	"print(s)"
252	252	]
253	253	},
254	254	{

304	304	"source": [
305	305	"line = \"1 2 3 4 5\"\n",
306	306	"numbers = line.split()\n",
307		"print (numbers)\n",
	307	"print(numbers)\n",
308	308	"type(numbers)"
309	309	]
310	310	},

371	371	"outputs": [],
372	372	"source": [
373	373	"s = \"HELLO WORLD\"\n",
374		"print (s.lower())\n",
	374	"print(s.lower())\n",
375	375	"\n",
376	376	"# 不会改变原来s的值\n",
377		"print (s)"
	377	"print(s)"
378	378	]
379	379	},
380	380	{

487	487	"outputs": [],
488	488	"source": [
489	489	"l = [1, 2.0, 'hello']\n",
490		"print (l)"
	490	"print(l)"
491	491	]
492	492	},
493	493	{

645	645	"source": [
646	646	"a = [10, 11, 12]\n",
647	647	"a.append(11)\n",
648		"print (a)"
	648	"print(a)"
649	649	]
650	650	},
651	651	{

663	663	"source": [
664	664	"a = [10, 11, 12]\n",
665	665	"a.append(['a', 'b'])\n",
666		"print (a)"
	666	"print(a)"
667	667	]
668	668	},
669	669	{

682	682	"source": [
683	683	"a = [10, 11, 12]\n",
684	684	"a.extend(['a', 'b'])\n",
685		"print (a)"
	685	"print(a)"
686	686	]
687	687	},
688	688	{

702	702	"a = [10, 11, 12, 13, 11]\n",
703	703	"# 在索引 3 插入 'a'\n",
704	704	"a.insert(3, 'a')\n",
705		"print (a)"
	705	"print(a)"
706	706	]
707	707	},
708	708	{

728	728	"# 根据下标进行删除\n",
729	729	"a = [1002, 'a', 'b', 'c']\n",
730	730	"del a[0]\n",
731		"print (a)"
	731	"print(a)"
732	732	]
733	733	},
734	734	{

747	747	"source": [
748	748	"a = [1002, 'a', 'b', 'c']\n",
749	749	"a.pop()\n",
750		"print (a)"
	750	"print(a)"
751	751	]
752	752	},
753	753	{

766	766	"source": [
767	767	"a = [1002, 'a', 'b', 'c', 'b']\n",
768	768	"a.remove(\"b\")\n",
769		"print (a)"
	769	"print(a)"
770	770	]
771	771	},
772	772	{

786	786	"outputs": [],
787	787	"source": [
788	788	"a = [10, 11, 12, 13, 11]\n",
789		"print (10 in a)\n",
790		"print (10 not in a)"
	789	"print(10 in a)\n",
	790	"print(10 not in a)"
791	791	]
792	792	},
793	793	{

869	869	"# 从小到大排序\n",
870	870	"a = [10, 1, 11, 13, 11, 2]\n",
871	871	"a.sort()\n",
872		"print (a)"
	872	"print(a)"
873	873	]
874	874	},
875	875	{

881	881	"# 从大到小排序\n",
882	882	"a = [10, 1, 11, 13, 11, 2]\n",
883	883	"a.sort(reverse=True)\n",
884		"print (a)"
	884	"print(a)"
885	885	]
886	886	},
887	887	{

899	899	"source": [
900	900	"a = [10, 1, 11, 13, 11, 2]\n",
901	901	"b = sorted(a)\n",
902		"print (\"a:\",a)\n",
903		"print (\"b:\",b)"
	902	"print(\"a:\",a)\n",
	903	"print(\"b:\",b)"
904	904	]
905	905	},
906	906	{

925	925	"source": [
926	926	"a = [10, 1, 11, 13, 11, 2]\n",
927	927	"a.reverse()\n",
928		"print (a)"
	928	"print(a)"
929	929	]
930	930	},
931	931	{

943	943	"source": [
944	944	"a = [10, 1, 11, 13, 11, 2]\n",
945	945	"b = a[::-1]\n",
946		"print (\"a:\",a)\n",
947		"print (\"b:\",b)"
	946	"print(\"a:\",a)\n",
	947	"print(\"b:\",b)"
948	948	]
949	949	},
950	950	{

1311	1311	"source": [
1312	1312	"x = 0.5\n",
1313	1313	"if x > 0:\n",
1314		" print (\"Hey!\")\n",
1315		" print (\"x is positive\")"
	1314	" print(\"Hey!\")\n",
	1315	" print(\"x is positive\")"
1316	1316	]
1317	1317	},
1318	1318	{

1347	1347	"source": [
1348	1348	"x = 0.5\n",
1349	1349	"if x > 0:\n",
1350		" print (\"Hey!\")\n",
1351		" print (\"x is positive\")\n",
1352		" print (\"This is still part of the block\")\n",
1353		"print (\"This isn't part of the block, and will always print.\")"
	1350	" print(\"Hey!\")\n",
	1351	" print(\"x is positive\")\n",
	1352	" print(\"This is still part of the block\")\n",
	1353	"print(\"This isn't part of the block, and will always print.\")"
1354	1354	]
1355	1355	},
1356	1356	{

1368	1368	"source": [
1369	1369	"x = -0.5\n",
1370	1370	"if x > 0:\n",
1371		" print (\"Hey!\")\n",
1372		" print (\"x is positive\")\n",
1373		" print (\"This is still part of the block\")\n",
1374		"print (\"This isn't part of the block, and will always print.\")\n"
	1371	" print(\"Hey!\")\n",
	1372	" print(\"x is positive\")\n",
	1373	" print(\"This is still part of the block\")\n",
	1374	"print(\"This isn't part of the block, and will always print.\")\n"
1375	1375	]
1376	1376	},
1377	1377	{

1403	1403	"source": [
1404	1404	"x = 0\n",
1405	1405	"if x > 0:\n",
1406		" print (\"x is positive\")\n",
	1406	" print(\"x is positive\")\n",
1407	1407	"elif x == 0:\n",
1408		" print (\"x is zero\")\n",
	1408	" print(\"x is zero\")\n",
1409	1409	"else:\n",
1410		" print (\"x is negative\")\n"
	1410	" print(\"x is negative\")\n"
1411	1411	]
1412	1412	},
1413	1413	{

1465	1465	"source": [
1466	1466	"year = 1900\n",
1467	1467	"if year % 400 == 0:\n",
1468		" print (\"This is a leap year!\")\n",
	1468	" print(\"This is a leap year!\")\n",
1469	1469	"# 两个条件都满足才执行\n",
1470	1470	"elif year % 4 == 0 and year % 100 != 0:\n",
1471		" print (\"This is a leap year!\")\n",
	1471	" print(\"This is a leap year!\")\n",
1472	1472	"else:\n",
1473		" print (\"This is not a leap year.\")\n"
	1473	" print(\"This is not a leap year.\")\n"
1474	1474	]
1475	1475	},
1476	1476	{

1502	1502	"source": [
1503	1503	"mylist = [3, 1, 4, 1, 5, 9]\n",
1504	1504	"if mylist:\n",
1505		" print (\"The first element is:\", mylist[0])\n",
	1505	" print(\"The first element is:\", mylist[0])\n",
1506	1506	"else:\n",
1507		" print (\"There is no first element.\")"
	1507	" print(\"There is no first element.\")"
1508	1508	]
1509	1509	},
1510	1510	{

1522	1522	"source": [
1523	1523	"mylist = []\n",
1524	1524	"if mylist:\n",
1525		" print (\"The first element is:\", mylist[0])\n",
	1525	" print(\"The first element is:\", mylist[0])\n",
1526	1526	"else:\n",
1527		" print (\"There is no first element.\")\n"
	1527	" print(\"There is no first element.\")\n"
1528	1528	]
1529	1529	},
1530	1530	{

1562	1562	"\n",
1563	1563	"# 循环条件\n",
1564	1564	"while i < 100:\n",
1565		" \n",
1566	1565	" # 求和累加\n",
1567	1566	" total += i\n",
1568		" \n",
1569	1567	" # 变量递增\n",
1570	1568	" i += 1\n",
1571	1569	" \n",
1572	1570	"# 打印结果\n",
1573		"print (total)"
	1571	"print(total)"
1574	1572	]
1575	1573	},
1576	1574	{

1589	1587	"plays = ['Hamlet', 'Macbeth', 'King Lear']\n",
1590	1588	"while plays:\n",
1591	1589	" play = plays.pop()\n",
1592		" print ('Perform', play)"
	1590	" print('Perform', play)"
1593	1591	]
1594	1592	},
1595	1593	{

1621	1619	"source": [
1622	1620	"plays = ['Hamlet', 'Macbeth', 'King Lear']\n",
1623	1621	"for play in plays:\n",
1624		" print ('Perform', play)"
	1622	" print('Perform', play)"
1625	1623	]
1626	1624	},
1627	1625	{

1642	1640	"total = 0\n",
1643	1641	"for i in range(100):\n",
1644	1642	" total += i\n",
1645		"print (total)"
	1643	"print(total)"
1646	1644	]
1647	1645	},
1648	1646	{

1667	1665	" if i % 2 != 0:\n",
1668	1666	" # 忽略奇数\n",
1669	1667	" continue\n",
1670		" print (i/2)"
	1668	" print(i/2)"
1671	1669	]
1672	1670	},
1673	1671	{

1730	1728	"values = [7, 6, 4, 7, 19, 2, 1]\n",
1731	1729	"for x in values:\n",
1732	1730	" if x <= 10:\n",
1733		" print ('Found:', x)\n",
	1731	" print('Found:', x)\n",
1734	1732	" break\n",
1735	1733	"else:\n",
1736		" print ('All values greater than 10')\n"
	1734	" print('All values greater than 10')\n"
1737	1735	]
1738	1736	},
1739	1737	{

1752	1750	"values = [11, 12, 13, 100]\n",
1753	1751	"for x in values:\n",
1754	1752	" if x <= 10:\n",
1755		" print ('Found:', x)\n",
	1753	" print('Found:', x)\n",
1756	1754	" break\n",
1757	1755	"else:\n",
1758		" print ('All values greater than 10')\n"
	1756	" print('All values greater than 10')\n"
1759	1757	]
1760	1758	}
1761	1759	],

+79

-79

01.02 python 进阶.ipynb less more

172	172	"metadata": {},
173	173	"outputs": [],
174	174	"source": [
175		"print (add(2, 3))\n",
176		"print (add('foo', 'bar'))"
	175	"print(add(2, 3))\n",
	176	"print(add('foo', 'bar'))"
177	177	]
178	178	},
179	179	{

189	189	"metadata": {},
190	190	"outputs": [],
191	191	"source": [
192		"print (add(2, \"foo\"))"
	192	"print(add(2, \"foo\"))"
193	193	]
194	194	},
195	195	{

221	221	"metadata": {},
222	222	"outputs": [],
223	223	"source": [
224		"print (add(x=2, y=3))\n",
225		"print (add(y=\"foo\", x=\"bar\"))"
	224	"print(add(x=2, y=3))\n",
	225	"print(add(y=\"foo\", x=\"bar\"))"
226	226	]
227	227	},
228	228	{

238	238	"metadata": {},
239	239	"outputs": [],
240	240	"source": [
241		"print (add(2, y=3))"
	241	"print(add(2, y=3))"
242	242	]
243	243	},
244	244	{

273	273	"metadata": {},
274	274	"outputs": [],
275	275	"source": [
276		"print (quad(2.0))"
	276	"print(quad(2.0))"
277	277	]
278	278	},
279	279	{

289	289	"metadata": {},
290	290	"outputs": [],
291	291	"source": [
292		"print (quad(2.0, b=3))"
293		]
294		},
295		{
296		"cell_type": "code",
297		"execution_count": null,
298		"metadata": {},
299		"outputs": [],
300		"source": [
301		"print (quad(2.0, 2, c=4))"
	292	"print(quad(2.0, b=3))"
	293	]
	294	},
	295	{
	296	"cell_type": "code",
	297	"execution_count": null,
	298	"metadata": {},
	299	"outputs": [],
	300	"source": [
	301	"print(quad(2.0, 2, c=4))"
302	302	]
303	303	},
304	304	{

316	316	"metadata": {},
317	317	"outputs": [],
318	318	"source": [
319		"print (quad(2.0, 2, a=2))"
	319	"print(quad(2.0, 2, a=2))"
320	320	]
321	321	},
322	322	{

354	354	"metadata": {},
355	355	"outputs": [],
356	356	"source": [
357		"print (add(1, 2, 3, 4))\n",
358		"print (add(1, 2))\n"
	357	"print(add(1, 2, 3, 4))\n",
	358	"print(add(1, 2))\n"
359	359	]
360	360	},
361	361	{

374	374	"def add(x, **kwargs):\n",
375	375	" total = x\n",
376	376	" for arg, value in kwargs.items():\n",
377		" print (\"adding %s=%s\"%(arg,value))\n",
	377	" print(\"adding %s=%s\"%(arg,value))\n",
378	378	" total += value\n",
379	379	" return total\n"
380	380	]

392	392	"metadata": {},
393	393	"outputs": [],
394	394	"source": [
395		"print (add(10, y=11, z=12, w=13))"
	395	"print(add(10, y=11, z=12, w=13))"
396	396	]
397	397	},
398	398	{

409	409	"outputs": [],
410	410	"source": [
411	411	"def foo(args, *kwargs):\n",
412		" print (args, kwargs)\n",
	412	" print(args, kwargs)\n",
413	413	"\n",
414	414	"foo(2, 3, x='bar', z=10)\n"
415	415	]

487	487	"outputs": [],
488	488	"source": [
489	489	"a, b, c = [1, 2, 3]\n",
490		"print (a, b, c)"
	490	"print(a, b, c)"
491	491	]
492	492	},
493	493	{

587	587	"\n",
588	588	"a = (10, 6, 7)\n",
589	589	"b = [2, 5, 3]\n",
590		"print (list(map(divid,a,b)))"
	590	"print(list(map(divid,a,b)))"
591	591	]
592	592	},
593	593	{

632	632	" return tot\n",
633	633	"\n",
634	634	"w = [0, 1, 2, 3]\n",
635		"print (sum(w), PI)\n",
	635	"print(sum(w), PI)\n",
636	636	"\n"
637	637	]
638	638	},

696	696	"metadata": {},
697	697	"outputs": [],
698	698	"source": [
699		"print (ex1.PI)"
	699	"print(ex1.PI)"
700	700	]
701	701	},
702	702	{

706	706	"outputs": [],
707	707	"source": [
708	708	"ex1.PI = 3.141592653\n",
709		"print (ex1.PI)"
	709	"print(ex1.PI)"
710	710	]
711	711	},
712	712	{

726	726	"metadata": {},
727	727	"outputs": [],
728	728	"source": [
729		"print (ex1.sum([2, 3, 4]))"
	729	"print(ex1.sum([2, 3, 4]))"
730	730	]
731	731	},
732	732	{

818	818	"def test():\n",
819	819	" w = [0,1,2,3]\n",
820	820	" assert(sum(w) == 6)\n",
821		" print ('test passed.')\n",
	821	" print('test passed.')\n",
822	822	"\n",
823	823	"if __name__ == '__main__':\n",
824	824	" test()\n"

1013	1013	" break\n",
1014	1014	" x = float(text)\n",
1015	1015	" y = math.log10(x)\n",
1016		" print (\"log10({0}) = {1}\".format(x, y))\n",
	1016	" print(\"log10({0}) = {1}\".format(x, y))\n",
1017	1017	"```\n",
1018	1018	"\n",
1019	1019	"这段代码接收命令行的输入，当输入为数字时，计算它的对数并输出，直到输入值为 `q` 为止。\n",

1035	1035	" break\n",
1036	1036	" x = float(text)\n",
1037	1037	" y = math.log10(x)\n",
1038		" print (\"log10({0}) = {1}\".format(x, y))\n"
	1038	" print(\"log10({0}) = {1}\".format(x, y))\n"
1039	1039	]
1040	1040	},
1041	1041	{

1062	1062	" break\n",
1063	1063	" x = float(text)\n",
1064	1064	" y = math.log10(x)\n",
1065		" print \"log10({0}) = {1}\".format(x, y)\n",
	1065	" print(\"log10({0}) = {1}\".format(x, y))\n",
1066	1066	" except ValueError:\n",
1067		" print (\"the value must be greater than 0\")\n",
	1067	" print(\"the value must be greater than 0\")\n",
1068	1068	"```"
1069	1069	]
1070	1070	},

1092	1092	" break\n",
1093	1093	" x = float(text)\n",
1094	1094	" y = math.log10(x)\n",
1095		" print (\"log10({0}) = {1}\".format(x, y))\n",
	1095	" print(\"log10({0}) = {1}\".format(x, y))\n",
1096	1096	" except ValueError:\n",
1097		" print (\"the value must be greater than 0\")\n"
	1097	" print(\"the value must be greater than 0\")\n"
1098	1098	]
1099	1099	},
1100	1100	{

1118	1118	" break\n",
1119	1119	" x = float(text)\n",
1120	1120	" y = 1 / math.log10(x)\n",
1121		" print \"log10({0}) = {1}\".format(x, y)\n",
	1121	" print(\"log10({0}) = {1}\".format(x, y))\n",
1122	1122	" except ValueError:\n",
1123		" print \"the value must be greater than 0\"\n",
	1123	" print(\"the value must be greater than 0\")\n",
1124	1124	"```\n",
1125	1125	"\n",
1126	1126	"假设我们将这里的 `y` 更改为 `1 / math.log10(x)`，此时输入 `1`："

1141	1141	" break\n",
1142	1142	" x = float(text)\n",
1143	1143	" y = 1 / math.log10(x)\n",
1144		" print (\"log10({0}) = {1}\".format(x, y))\n",
	1144	" print(\"log10({0}) = {1}\".format(x, y))\n",
1145	1145	" except ValueError:\n",
1146		" print (\"the value must be greater than 0\")\n"
	1146	" print(\"the value must be greater than 0\")\n"
1147	1147	]
1148	1148	},
1149	1149	{

1177	1177	" break\n",
1178	1178	" x = float(text)\n",
1179	1179	" y = 1 / math.log10(x)\n",
1180		" print (\"1 / log10({0}) = {1}\".format(x, y))\n",
	1180	" print(\"1 / log10({0}) = {1}\".format(x, y))\n",
1181	1181	" except Exception:\n",
1182		" print (\"invalid value\")\n"
	1182	" print(\"invalid value\")\n"
1183	1183	]
1184	1184	},
1185	1185	{

1206	1206	" break\n",
1207	1207	" x = float(text)\n",
1208	1208	" y = 1 / math.log10(x)\n",
1209		" print (\"1 / log10({0}) = {1}\".format(x, y))\n",
	1209	" print(\"1 / log10({0}) = {1}\".format(x, y))\n",
1210	1210	" except (ValueError, ZeroDivisionError):\n",
1211		" print (\"invalid value\")\n"
	1211	" print(\"invalid value\")\n"
1212	1212	]
1213	1213	},
1214	1214	{

1233	1233	" break\n",
1234	1234	" x = float(text)\n",
1235	1235	" y = 1 / math.log10(x)\n",
1236		" print (\"1 / log10({0}) = {1}\".format(x, y))\n",
	1236	" print(\"1 / log10({0}) = {1}\".format(x, y))\n",
1237	1237	" except ValueError:\n",
1238		" print (\"the value must be greater than 0\")\n",
	1238	" print(\"the value must be greater than 0\")\n",
1239	1239	" except ZeroDivisionError:\n",
1240		" print (\"the value must not be 1\")\n"
	1240	" print(\"the value must not be 1\")\n"
1241	1241	]
1242	1242	},
1243	1243	{

1262	1262	" break\n",
1263	1263	" x = float(text)\n",
1264	1264	" y = 1 / math.log10(x)\n",
1265		" print (\"1 / log10({0}) = {1}\".format(x, y))\n",
	1265	" print(\"1 / log10({0}) = {1}\".format(x, y))\n",
1266	1266	" except ValueError:\n",
1267		" print (\"the value must be greater than 0\")\n",
	1267	" print(\"the value must be greater than 0\")\n",
1268	1268	" except ZeroDivisionError:\n",
1269		" print (\"the value must not be 1\")\n",
	1269	" print(\"the value must not be 1\")\n",
1270	1270	" except Exception:\n",
1271		" print (\"unexpected error\")\n"
	1271	" print(\"unexpected error\")\n"
1272	1272	]
1273	1273	},
1274	1274	{

1302	1302	" break\n",
1303	1303	" x = float(text)\n",
1304	1304	" y = 1 / math.log10(x)\n",
1305		" print (\"1 / log10({0}) = {1}\".format(x, y))\n",
	1305	" print(\"1 / log10({0}) = {1}\".format(x, y))\n",
1306	1306	" except ValueError as exc:\n",
1307	1307	" if exc.message == \"math domain error\":\n",
1308		" print (\"the value must be greater than 0\")\n",
	1308	" print(\"the value must be greater than 0\")\n",
1309	1309	" else:\n",
1310		" print (\"could not convert '%s' to float\" % text)\n",
	1310	" print(\"could not convert '%s' to float\" % text)\n",
1311	1311	" except ZeroDivisionError:\n",
1312		" print (\"the value must not be 1\")\n",
	1312	" print(\"the value must not be 1\")\n",
1313	1313	" except Exception as exc:\n",
1314		" print (\"unexpected error:\", exc.message)\n"
	1314	" print(\"unexpected error:\", exc.message)\n"
1315	1315	]
1316	1316	},
1317	1317	{

1358	1358	"outputs": [],
1359	1359	"source": [
1360	1360	"try:\n",
1361		" print (1)\n",
	1361	" print(1)\n",
1362	1362	"except:\n",
1363	1363	" pass\n",
1364	1364	"else:\n",
1365		" print ('else was called.')"
	1365	" print('else was called.')"
1366	1366	]
1367	1367	},
1368	1368	{

1379	1379	"outputs": [],
1380	1380	"source": [
1381	1381	"try:\n",
1382		" print (1/0)\n",
	1382	" print(1/0)\n",
1383	1383	"except ZeroDivisionError:\n",
1384		" print ('divide by 0.')\n",
	1384	" print('divide by 0.')\n",
1385	1385	"else:\n",
1386		" print ('else was called.')"
	1386	" print('else was called.')"
1387	1387	]
1388	1388	},
1389	1389	{

1404	1404	"outputs": [],
1405	1405	"source": [
1406	1406	"try:\n",
1407		" print (1)\n",
	1407	" print(1)\n",
1408	1408	"finally:\n",
1409		" print ('finally was called.')"
	1409	" print('finally was called.')"
1410	1410	]
1411	1411	},
1412	1412	{

1423	1423	"outputs": [],
1424	1424	"source": [
1425	1425	"try:\n",
1426		" print (1 / 0)\n",
	1426	" print(1 / 0)\n",
1427	1427	"finally:\n",
1428		" print ('finally was called.')"
	1428	" print('finally was called.')"
1429	1429	]
1430	1430	},
1431	1431	{

1442	1442	"outputs": [],
1443	1443	"source": [
1444	1444	"try:\n",
1445		" print (1 / 0)\n",
	1445	" print(1 / 0)\n",
1446	1446	"except ZeroDivisionError:\n",
1447		" print ('divide by 0.')\n",
	1447	" print('divide by 0.')\n",
1448	1448	"finally:\n",
1449		" print ('finally was called.')\n"
	1449	" print('finally was called.')\n"
1450	1450	]
1451	1451	},
1452	1452	{

1594	1594	"outputs": [],
1595	1595	"source": [
1596	1596	"text = f.read()\n",
1597		"print (text)"
	1597	"print(text)"
1598	1598	]
1599	1599	},
1600	1600	{

1612	1612	"source": [
1613	1613	"f = open('test.txt')\n",
1614	1614	"lines = f.readlines()\n",
1615		"print (lines)\n"
	1615	"print(lines)\n"
1616	1616	]
1617	1617	},
1618	1618	{

1646	1646	"source": [
1647	1647	"f = open('test.txt')\n",
1648	1648	"for line in f:\n",
1649		" print (line)\n",
	1649	" print(line)\n",
1650	1650	"f.close()\n"
1651	1651	]
1652	1652	},

1705	1705	"metadata": {},
1706	1706	"outputs": [],
1707	1707	"source": [
1708		"print (open('myfile.txt').read())"
	1708	"print(open('myfile.txt').read())"
1709	1709	]
1710	1710	},
1711	1711	{

1724	1724	"f = open('myfile.txt', 'w')\n",
1725	1725	"f.write('another hello world!')\n",
1726	1726	"f.close()\n",
1727		"print (open('myfile.txt').read())\n"
	1727	"print(open('myfile.txt').read())\n"
1728	1728	]
1729	1729	},
1730	1730	{

1743	1743	"f = open('myfile.txt', 'a')\n",
1744	1744	"f.write('... and more')\n",
1745	1745	"f.close()\n",
1746		"print (open('myfile.txt').read())\n"
	1746	"print(open('myfile.txt').read())\n"
1747	1747	]
1748	1748	},
1749	1749	{

1764	1764	"f = open('myfile.txt', 'w+')\n",
1765	1765	"f.write('hello world!')\n",
1766	1766	"f.seek(6)\n",
1767		"print (f.read())\n",
	1767	"print(f.read())\n",
1768	1768	"f.close()\n"
1769	1769	]
1770	1770	},

1814	1814	"f = open('newfile.txt','w')\n",
1815	1815	"f.write('hello world')\n",
1816	1816	"g = open('newfile.txt', 'r')\n",
1817		"print (repr(g.read()))\n"
	1817	"print(repr(g.read()))\n"
1818	1818	]
1819	1819	},
1820	1820	{

1837	1837	" f.write('hello world: ' + str(i) + '\\n')\n",
1838	1838	"\n",
1839	1839	"g = open('newfile.txt', 'r')\n",
1840		"print (g.read())\n",
	1840	"print(g.read())\n",
1841	1841	"f.close()\n",
1842	1842	"g.close()\n"
1843	1843	]

1885	1885	"outputs": [],
1886	1886	"source": [
1887	1887	"g = open('newfile.txt', 'r')\n",
1888		"print (g.read())\n",
	1888	"print(g.read())\n",
1889	1889	"f.close()\n",
1890	1890	"g.close()\n"
1891	1891	]

2044	2044	"\n",
2045	2045	"# 可以按行迭代数据\n",
2046	2046	"for row in r:\n",
2047		" print (row)\n",
	2047	" print(row)\n",
2048	2048	"\n",
2049	2049	"# 关闭文件\n",
2050	2050	"fp.close()\n"

-3

01.03 机器学习常用的包.ipynb less more

1051	1051	"source": [
1052	1052	"# 生成 series\n",
1053	1053	"s = pd.Series([1,3,5,np.nan,6,8])\n",
1054		"\n",
1055	1054	"print(s)"
1056	1055	]
1057	1056	},

1063	1062	"source": [
1064	1063	"# 生成 dataframe \n",
1065	1064	"dates = pd.date_range('20200101', periods=15)\n",
1066		"\n",
1067	1065	"df = pd.DataFrame(np.random.randn(15,4), index=dates, columns=list('ABCD'))\n",
1068		"\n",
1069	1066	"df"
1070	1067	]
1071	1068	},