python dataframe (method,partial,dir,hasattr,setattr,getarrt)

# * _*_ coding:utf-8 _*_
__author__:'denny 20170730'
from functools import reduce
import functools
import pandas as pd

#create dataframe
#df method
#partial
#dir,hasattr,setattr,getarrt

def createdf():
    df = pd.DataFrame(
        {'a':[1,2,3],
         'b':[4,5,6],
         'c':[7,8,9]},
        index = [1,2,3])
    print(df)
def createdfnoindex():

    df = pd.DataFrame(
        {'a':[1,2,3],
         'b':[4,5,6],
         'c':[7,8,9]},
         index = df.MultiIndex.from_tuples(
             [('d', 1), ('d', 2), ('e', 2)],
             names=['n', 'v']))


def createadfcolumns():
    df0 = pd.DataFrame(
        {'a':[1,2,3],
         'b':[4,5,6],
         'c':[7,8,9]},
        index = [1,2,3])
    df = pd.DataFrame(
        [
         [1,2,3],
         [4,5,9],
         [7,8,]
        ],
        index =[1,2,3],
        columns=['a','b','c']
    )
    print(df0)
    print(df)
    #print(df.shape)
    print(pd.merge(df0, df))
   # print(df.dropna())
    #print(df.loc[0:1,['b']])
    #print(df.iloc[0:1][0:2])
    #        print(df[0:2][df['a']>1])
    #print(df.iloc[0,2])
    #print(df.iloc[0:2,1:2])
    #print(df.loc['0',['a','b']])
    #print(df['a'].corr(df['c']))
    #print(df[0:2][0:1])
    #print(df.sort_index(axis=0,ascending=False))

print('************')
#createdf()
#createadfcolumns()

int2 = functools.partial(int,base=2)
#print(int2('100000000'))
#print(dir(str))
#setattr(int2,'x',10)
#print(hasattr(int2,'x'))
#print(int2.x)

---------------python function test-----------------------

def testprint():
    dictest()
    s = set((1, 2, 2, 3))
    s2 = ['b', 'a', 'c']
    print(s)
    print(s2.sort())
    print(hex(10))

    y = my_abs(3)
    print(y)
    ss = tuple(range(1, 11))
    s3 = [x + y for x in '123' for y in 'abc']
    print(s3)
    L = [x * x for x in range(10)]
    print(L)

def dictest():
    d = {'a':'x','b':'y'}
    if 'a' in d:
        print('yes')
    else:
        pass

def my_abs(x):
    if not isinstance(x,(int,float)):
        raise  TypeError('bad numer')
    if x >= 0:
        return 1.0,2.23,4
    else:
        return -x,x-1,x

        print(d.get('a',-1))

def fact(n):
    if n==1:
        return 1
    return n * fact(n-1)

def testiteration():
    d={'a':1,'b':2}
    for x,y in enumerate(d.items()):
        print(x,y)

def testgenerator():
    g = (x * x for x in range(10))
    for n in g:
        print(n)

def fib(max):
    n,a,b=0,0,1
    while n<max:
        print(b)
        a,b=b,a+b
        n =n+1
    return 'done'

def generatortest(x):
     n,a,b=0,0,1
     while n<x:
         yield  b
         a,b=b,a+b
         n=n+1

def testYieid(x):
    g=generatortest(x)
    while True:
         try:
             x = next(g)
             print( x)
         except StopIteration as e:
             print(e.value)
             break

def genreratortest(i):
    if i==0:
        yield  [1]
    elif i==1:
        yield [1,1]
    elif i==2:
        yield  [1,2,1]
    else:
        yield [1, 3,3,1]


def demogenrerator():
    for i in range(5):
        f = genreratortest(i)
        t = next(f)
        print(t)

def add(x,y):
    return x + y

def strreser(s):
    return {'0':0,'1':1,'2':2,'3':3}[s]

def cptitle(s):
     c =s.capitalize()
     return c

r = reduce(add,[1,2,3,4,5])
l=list(map(str,[1,2,3,4,5]))
l2=reduce(lambda x,y:x * 10 +y,[1,2,3,4,5])
L1=['asdf','asdfs','edfd']


def log(f):
     #@ functools.wraps(func)
     def test():
         print('call %s():' % f.__name__)
         return f()
     return test


@ log
def now():
    print('2015-3-25')


now()


def log2(f):
    def lg():
        print('testdsd')
        return now2()
    return lg

@log2
def now2():
    print('test derewa')