# -*- coding: utf-8 -*-
import os
from PyDemo01 import run_ex_by_flag
# EXAMPLE 01, compare
def ex01():
tmp_num = 3
if 2 < tmp_num < 4:
print 'Chained comparison operators work! \n' * 3
run_ex_by_flag(ex01)
# EXAMPLE 02, enumerate
def ex02():
some_list = [(1, 2, 'def'), (2, -4, 'ghi'), (3, 6, 'abc')]
tmp_list = [(val[2], idx, val) for (idx, val) in enumerate(some_list)]
tmp_list.sort()
print tmp_list
my_phrase = ['No', 'one', 'expects', 'the', 'Spanish', 'Inquisition']
my_dict = {idx: value for idx, value in enumerate(my_phrase)}
print my_dict
run_ex_by_flag(ex02)
# -*- coding: utf-8 -*-
import os
from PyDemo01 import run_ex_by_flag
# EXAMPLE 01, compare
def ex01():
tmp_num = 3
if 2 < tmp_num < 4:
print 'Chained comparison operators work! \n' * 3
run_ex_by_flag(ex01)
# EXAMPLE 02, enumerate
def ex02():
some_list = [(1, 2, 'def'), (2, -4, 'ghi'), (3, 6, 'abc')]
tmp_list = [(val[2], idx, val) for (idx, val) in enumerate(some_list)]
tmp_list.sort()
print tmp_list
my_phrase = ['No', 'one', 'expects', 'the', 'Spanish', 'Inquisition']
my_dict = {idx : value for idx, value in enumerate(my_phrase)}
print my_dict
run_ex_by_flag(ex02)
# EXAMPLE 03, subprocess, try catch block, help
def ex03():
# collections
# EXAMPLE 01, defaultdict
def ex01_01():
from collections import defaultdict
tmp_lst = [('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4),
('red', 1)]
d_dict = defaultdict(list) # set default value to []
for k, v in tmp_lst:
d_dict[k].append(v)
print sorted(d_dict.iteritems())
run_ex_by_flag(ex01_01)
def ex01_02():
tmp_lst = [('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4),
('red', 1)]
d_dict = {}
for k, v in tmp_lst:
d_dict.setdefault(k, []).append(v) # set default value to []
print sorted(d_dict.items())
run_ex_by_flag(ex01_02)
from PyDemo01 import run_ex_by_flag
# EXAMPLE 01, Tips
def ex0101():
my_map = {'k1': 'v1', 'k2': 'v2', 'k3': 'v3'}
print 'Yes:'
for k in my_map:
print 'key:', k
print 'No:'
for k in my_map.keys():
print 'key:', k
run_ex_by_flag(ex0101)
def ex0102():
def condition_exp_test(cond):
return 'Yes' if cond else 'No'
print 'results:', condition_exp_test(False)
run_ex_by_flag(ex0102)
def ex0103():
# write long string in multiple lines
my_str = ('this is test1, '
import os
from PyDemo01 import run_ex_by_flag
# collections
# EXAMPLE 01, defaultdict
def ex01_01():
from collections import defaultdict
tmp_lst = [('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4), ('red', 1)]
d_dict = defaultdict(list) # set default value to []
for k, v in tmp_lst:
d_dict[k].append(v)
print sorted(d_dict.iteritems())
run_ex_by_flag(ex01_01)
def ex01_02():
tmp_lst = [('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4), ('red', 1)]
d_dict = {}
for k, v in tmp_lst:
d_dict.setdefault(k, []).append(v) # set default value to []
print sorted(d_dict.items())
run_ex_by_flag(ex01_02)
def ex01_03():
from collections import defaultdict
tmp_lst = [('red', 1), ('blue', 2), ('red', 3), ('blue', 4), ('red', 1), ('blue', 4)]
d_dict = defaultdict(set) # set default value to set (include distinct value)
return in_deco_func
my_func = deco_func(my_func) # re-assign
my_func('test override')
print '*' * 30, 'case 3'
@deco_func
def my_new_func(name):
print 'New, hello,', name
my_new_func('test @deco')
run_ex_by_flag(ex01)
# EXAMPLE 02, method override in class
class OverrideTest(object):
def check(self):
''' only be invoked at first time'''
print 'check Invoked'
self.check = self.check_post # re-assign
def check_post(self):
print 'check_post Invoked'
def ex02():
my_test = OverrideTest()
def ex24():
def is_even(x):
return (x % 2) == 0
print '*' * 20, 'case 1'
tmp_lst = range(10)
print type(tmp_lst)
print tmp_lst
print '*' * 20, 'case 2'
tmp_gen = xrange(10)
print type(tmp_gen)
print [val for val in tmp_gen if val % 2 == 0]
print [val for val in tmp_gen if is_even(val)]
print filter(is_even, tmp_gen)
run_ex_by_flag(ex24)
# EXAMPLE 25, generator
def ex2501():
# 1, yield
def generate_ints(n):
for i in xrange(n):
yield i
my_gen1 = generate_ints(10)
print 'Type:', type(my_gen1)
for ele in my_gen1:
print 'element:', ele
my_gen2 = generate_ints(3)
print 'Type:', type(my_gen2)
print my_gen2.next()
print my_gen2.next()
print next(my_gen2)
try:
print next(my_gen2)
except StopIteration, e:
print e
run_ex_by_flag(ex2501)
def ex2502():
# 2, pass value by send()
def counter(max_value):
i = 0
while i < max_value:
val = (yield i)
if val is not None:
i = val
else:
i += 1
my_gen = counter(10)
print 'Type:', type(my_gen)
print my_gen.next()
print my_gen.next()
print my_gen.send(8)
print next(my_gen)
try:
print next(my_gen)
except StopIteration, e:
print e
kittens.append(k)
print kittens
del kittens[:]
print '*' * 20, 'case 2'
kittens = [k for k, v in cats.items() if v < 7]
print kittens
del kittens[:]
print '*' * 20, 'case 3'
kittens = map(lambda (k, v): k,
filter(lambda (k, v): v < 7, cats.iteritems()))
print kittens
run_ex_by_flag(ex01)
# EXAMPLE 02, file read
def ex02():
tmp_file_path = os.path.join(os.getcwd(), 'zjunittest.log')
with open(tmp_file_path, 'r') as f:
print 'type:', type(f)
if '__enter__' in dir(f) and '__exit__' in dir(f):
print 'with block'
if '__iter__' in dir(f):
print 'iterator'
for line in f:
print line.strip()
print'in in_deco_func'
func(name)
return in_deco_func
my_func = deco_func(my_func) # re-assign
my_func('test override')
print '*' * 30, 'case 3'
@deco_func
def my_new_func(name):
print 'New, hello,', name
my_new_func('test @deco')
run_ex_by_flag(ex01)
# EXAMPLE 02, method override in class
class OverrideTest(object):
def check(self):
''' only be invoked at first time'''
print 'check Invoked'
self.check = self.check_post # re-assign
def check_post(self):
print 'check_post Invoked'
def ex02():
my_test = OverrideTest()
import os
from PyDemo01 import run_ex_by_flag
# EXAMPLE 01, Tips
def ex0101():
my_map = {'k1':'v1', 'k2':'v2', 'k3':'v3'}
print 'Yes:'
for k in my_map:
print 'key:', k
print 'No:'
for k in my_map.keys():
print 'key:', k
run_ex_by_flag(ex0101)
def ex0102():
def condition_exp_test(cond):
return 'Yes' if cond else 'No'
print 'results:', condition_exp_test(False)
run_ex_by_flag(ex0102)
def ex0103():
# write long string in multiple lines
my_str = ('this is test1, '
'this is test2, '
'this is test3, ' 'this is test4')
print 'output:', my_str