list page 139

Author: 罗晟

cluo

@@ -1,8 +1,5 @@
-1
-2
-3
-4
-5
-6
-7
-8
+ cluo
+acluo1
+acluo2
+acluo3
+acluo4

type.py

@@ -1 +1,180 @@
-type(42)
+#number
+
+print 2 ** 100
+print 1.5 * 4
+print len(str(2 ** 100000))
+
+3.1415 * 2
+print (3.1415 * 2)
+import math
+print math.pi
+print math.sqrt(4)
+
+import random
+print random.random()
+print random.choice([1, 2, 3, 4])
+
+S = 'Spam'
+print len(S)
+print S[0]
+print S[3]
+print S[-1]
+print S[-2]
+print S[1:3]
+print S[:]
+print S + 'xyz'
+print S * 8
+
+#str only support over rewrite
+S = 'z' + S[1:]
+print S
+strList = "aaa,bbb,cccc,dd"
+list = strList.split(',')
+print list
+print list[1:]
+
+#str method
+S = S.upper()
+print S
+isAl = S.isalpha()
+print isAl
+isDigit =  S.isdigit();
+print isDigit
+line = 'aaa,bbb,ccc,dd\n'
+line =  line.rstrip()
+print line * 2
+
+#str format
+str = '%s,eggs,and %s' %('cluo','chunling')
+print str
+str = '{0} eggs , and {1} chicken'.format('1','3')
+print str
+
+#check method of object
+methodlist = dir(str)
+print methodlist
+print __name__
+doc = help(str.replace)
+
+#break line """" <pre></pre>
+msg = """ cluo
+cluo1
+cluo2
+cluo3
+cluo4"""
+
+fileObj = open('cluo','w')
+fileObj.write(msg)
+fileObj = open('cluo','r')
+arr = []
+for eachLine in fileObj:
+    arr.append(eachLine)
+str = 'a'.join(arr)
+fileObj = open('cluo','w')
+fileObj.write(str)
+
+#regex
+import re
+match = re.match('Hello\s+(.*)world','Hello        python world')
+inner = match.group(1);
+print inner
+
+match = re.match('/(.*)/(.*)/(.*)','/usr/home/bbq')
+groups = match.groups()
+print groups
+print groups[0:]
+
+
+#list
+l = [123, 'spam', 1.23]
+s = 'string'
+print len(l)
+print len(s)
+print l[-1]
+print l[0:-1]
+print l + [4, 5, 6]
+
+132
+
+#list method
+l.append('NI')
+print l
+
+l.sort();
+print l
+l.reverse();
+print l
+
+m = [
+[1, 2, 3],
+[4, 5, 6],
+[7, 8 ,9]
+]
+print m
+print m[1];
+print m[1][0]
+
+#list parse method  (pre result_function)
+cols2 = [row[1] for row in m]
+print cols2;
+
+cols3 = [row[1] + 1 for row in m]
+print cols3
+
+#list parse method (add filter_function) map
+cols4 = [row[1] + 1 for row in m if row[1] % 2 == 0]
+print cols4
+
+#list numpy filter
+diag = [m[i][i] for i in [0, 1 ,2]]
+print diag
+
+doubles = [c * 2 for c in 'spam']
+print doubles
+
+G =  (sum(row) for row in m)
+print G
+print next(G)
+print next(G)
+print next(G)
+
+list = [ord(x) for x in 'spaam']
+print list
+list = {ord(x) for x in 'spaam'}
+print list
+list = {x:ord(x) for x in 'spaam'}
+print list
+
+D = {'food':'spam', 'quantity':4, 'color':'pink'}
+print D['food']
+print D['quantity'] +1
+
+D = {}
+D['name'] = 'Bob'
+D['job'] = 'dev'
+D['age'] = 40
+print D
+
+rec ={
+    'name':{'first': 'Bob', 'last': 'Smith'},
+    'job':['dev', 'mgr'],
+    'age': 40.5
+}
+
+print rec['name']
+print rec['name']['last']
+print rec['job'][-1]
+rec['job'].append('janitor')
+print rec
+
+print D.keys()
+list  = D.keys()
+list.sort() #return none????
+print list
+
+#auto sorted
+D ={'b':2,'a':1,'c':3}
+for item in D:
+    print(item,'=>',D[item])
+for item in sorted(D):   #sorted key
+    print(item,'=>',D[item])