python ex

Author: Sinrez

.DS_Store

@@ -0,0 +1,32 @@
+# countries = ['Switzerland', 'Estonia', 'Sweden', 'Latvia', 'Butan', 'Nepal']
+
+# for index in range(len(countries)):
+#     print(f'{index+1}, {countries[index]}')
+
+# for item in enumerate(countries, start=1):
+#     print(item)
+
+# for index, country in enumerate(countries, start=1):
+#     print(f'{index}, {country}')
+
+#=============================================================================================
+
+# from itertools import zip_longest
+
+# countries = ['Switzerland', 'Estonia', 'Sweden', 'Latvia', 'Bhutan', 'Nepal']
+# capitals = ['Bern', 'Tallin', 'Stockholm', 'Riga']
+
+# for country, capital in zip_longest(countries, capitals, fillvalue='Unknown'):
+#     print(f'{capital} is the capital of {country}')
+
+# ============================================================================================
+
+countries = ['Switzerland', 'Estonia', 'Sweden', 'Latvia', 'Bhutan', 'Nepal']
+capitals = ['Bern', 'Tallin', 'Stockholm', 'Riga', 'Thimphu', 'Kathmandu']
+
+destinations = list(zip(countries, capitals))
+print(destinations)
+
+country, capital = zip(*destinations)
+print(country)
+print(capital)

stepic/.DS_Store

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+import itertools
+
+def main():
+    days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"]
+    dni = ["Воскресенье", "Понедельник", "Вторник", "Среда", "Четверг", "Пятница", "Суббота"]
+
+    # i = iter(days)
+    # print(next(i))
+    # print(next(i))
+    # print(next(i))
+    # print(next(i))
+
+    # with open("testfile.txt", "r") as fp:
+    #     for line in iter(fp.readline, ''):
+    #         print(line)
+
+    # for i in range(len(days)):
+    #     print(i, days[i])
+
+    # cycle_days = itertools.cycle(days)
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+    # print(next(cycle_days))
+
+    # count_stuff = itertools.count(100, 10)
+    # print(next(count_stuff))
+    # print(next(count_stuff))
+    # print(next(count_stuff))
+    # print(next(count_stuff))
+    # print(next(count_stuff))
+
+    prices = [10, 20, 30, 40, 50, 40 ,30 ,20 , 10, 100]
+    acc = itertools.accumulate(prices)
+    print(list(acc))
+   
+    # chain_stuff = itertools.chain(days, prices)
+    # print(list(chain_stuff))
+
+    # def test_func(x):
+    #     return x < 50
+
+    # print(list(itertools.dropwhile(test_func, prices)))
+    # print(list(itertools.takewhile(test_func, prices)))
+
+
+if __name__ == "__main__":
+    main()

stepic/python_fullstack/enumerate_zip.py

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+# lambda argument(s): expression
+
+#Normal python function
+def func(x):
+    return x+x
+
+#Lambda function
+lambda x: x+x
+
+# scalar (single) values
+print((lambda x: x*2)(14))
+
+# # list
+list_1 = [1,2,3,4,5,6,7,8,9]
+list_obj = (lambda x: x*2)
+print(list_obj(list_1))
+
+#string
+str1 = 'AveCoder' 
+rev_upper = lambda string: string.upper()[::-1]
+print(rev_upper(str1))
+
+# using with list comprehensions:
+is_even_list = [lambda arg=x: arg * 10 for x in range(1, 15)]
+ 
+# iterate on each lambda function
+# and invoke the function to get the calculated value
+for item in is_even_list:
+    print(item())
+
+# conditional if-else
+# Example of lambda function using if-else
+cond = lambda a, b : a if(a > b) else b
+ 
+print(cond(10, 20))
+
+#################################
+# Lambda with multiple statements
+List = [[12,23,56],[2, 6, 14, 72],[13, 5, 7, 22]]
+ 
+# Sort each sublist
+srt_lst = lambda x: (sorted(i) for i in x)
+ 
+# Get the second largest element
+sec_lrg = lambda x, f : [y[len(y)-2] for y in f(x)]
+res = sec_lrg(List, srt_lst)
+ 
+print(res)

stepic/python_fullstack/iterators_example.py

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+not_raw_str = 'Not\tRaw\nString'
+
+#print(not_raw_str)
+
+raw_str = r'Not\tRaw\nString'
+
+print(raw_str)
+
+print(type(not_raw_str))
+print(type(raw_str))
+
+print(r'Not\tRaw\nString' == 'Not\\tRaw\\nString')
+
+print(len(not_raw_str))
+print(len(raw_str))
+
+print(list(not_raw_str))
+print(list(raw_str))
+
+########
+
+path = 'C:\\Windows\\system32\\cmd.exe'
+rpath = r'C:\Windows\system32\cmd.exe'
+
+print(path == rpath)
+
+path2 = 'C:\\Windows\\system32\\'
+rpath2 = r'C:\Windows\system32' + '\\'
+
+print(path2 == rpath2)
+
+#########################
+
+s_r = repr(not_raw_str)
+print(s_r)
+
+print(list(s_r))
+
+s_r2 = repr(not_raw_str)[1:-1]
+print(s_r2)
+
+print(raw_str == s_r2)
+
+print(r'\t' == repr('\t')[1:-1])

stepic/python_fullstack/lambda_example.py

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+This is number 1
+This is number 2
+This is number 3
+This is number 4
+This is number 5
+This is number 6
+This is number 7