Add 3.8 files

qqlexa · Jul 14, 2022 · Jun 23, 2022 · Jun 23, 2022 · 397921105a6bc01d096fd4ce22b9cf113395935c
commit 397921105a6bc01d096fd4ce22b9cf113395935c
diff --git a/3.8/companies_0.py b/3.8/companies_0.py
@@ -0,0 +1,15 @@
+companies = []
+if (n := len(companies)) == 1 and (first_company := companies[0]):
+   print(f'We have only one company: {first_company}')
+elif (n := len(companies)) > 1 and (first_company := companies[0]):
+   print(f'We have such companies as: {", ".join(companies)}')
+else:
+   print(f'We have no companies')
+
+print(n)
+# 1
+print(first_company)
+# Traceback (most recent call last):
+#   File "/home/user/main.py", line 12, in <module>
+#     print(first_company)
+# NameError: name 'first_company' is not defined
diff --git a/3.8/companies_1.py b/3.8/companies_1.py
@@ -0,0 +1,12 @@
+companies = ['Flyaps']
+if (n := len(companies)) == 1 and (first_company := companies[0]):
+   print(f'We have only one company: {first_company}')
+elif (n := len(companies)) > 1 and (first_company := companies[0]):
+   print(f'We have such companies as: {", ".join(companies)}')
+else:
+   print(f'We have no companies')
+
+print(n)
+# 1
+print(first_company)
+# Flyaps
diff --git a/3.8/companies_3.py b/3.8/companies_3.py
@@ -0,0 +1,7 @@
+companies = ['Flyaps', 'Google', 'Apple']
+if (n := len(companies)) == 1 and (first_company := companies[0]):
+  print(f'We have only one company: {first_company}')
+elif (n := len(companies)) > 1 and (first_company := companies[0]):
+  print(f'We have such companies as: {", ".join(companies)}')
+else:
+  print(f'We have no companies')
diff --git a/3.8/csv37.py b/3.8/csv37.py
@@ -0,0 +1,7 @@
+import csv
+
+with open('file.csv', 'rt') as f:
+   reader = csv.DictReader(f)
+   for i in reader:
+       print(type(i))          # OrderedDict
+       print(type(i) == dict)  # False
diff --git a/3.8/csv38.py b/3.8/csv38.py
@@ -0,0 +1,7 @@
+import csv
+
+with open('file.csv', 'rt') as f:
+   reader = csv.DictReader(f)
+   for i in reader:
+       print(type(i))
+       print(type(i) == dict)
diff --git a/3.8/format_string1.py b/3.8/format_string1.py
@@ -0,0 +1,9 @@
+from math import pi
+
+class Employee:
+   name = 'Oleksii'
+   company = 'Flyaps'
+
+print(f'Employee.name={Employee.name}, Employee.company={Employee.company}')
+print(f'round(pi, 2) = {round(pi, 2)}')
+print(f'pi = {pi:.5f}')
diff --git a/3.8/format_string2.py b/3.8/format_string2.py
@@ -0,0 +1,9 @@
+from math import pi
+
+class Employee:
+   name = 'Oleksii'
+   company = 'Flyaps'
+
+print(f'{Employee.name=}, {Employee.company=}')
+print(f'{round(pi, 2) = }')
+print(f'{pi = :.5f}')
diff --git a/3.8/positional_parameters1.py b/3.8/positional_parameters1.py
@@ -0,0 +1,11 @@
+def f(a, b, /, c, d, *, e, g):
+   print(a, b, c, d, e, g)
+
+
+# The following is a valid call:
+f(10, 20, 30, d=40, e=50, g=60)
+
+
+# However, these are invalid calls:
+f(10, b=20, c=30, d=40, e=50, g=60)   # b cannot be a keyword argument
+f(10, 20, 30, 40, 50, g=60)           # e must be a keyword argument
diff --git a/3.8/positional_parameters2.py b/3.8/positional_parameters2.py
@@ -0,0 +1,8 @@
+def divmod(a, b, /):
+   """Emulate the built in divmod() function"""
+   return a // b, a % b
+
+
+divmod(a=1, b=2)
+
+len(obj='hello')  # The "obj" keyword argument impairs readability
diff --git a/3.8/positional_parameters3.py b/3.8/positional_parameters3.py
@@ -0,0 +1 @@
+len(obj='hello')  # The "obj" keyword argument impairs readability
diff --git a/3.8/positional_parameters4.py b/3.8/positional_parameters4.py
@@ -0,0 +1,6 @@
+def f(a, b, /, *args, **kwargs):
+   print(a, b, args, kwargs)
+
+
+f(10, 20, 1, 2, 3, a=1, b=2, c=3)         # a and b are used in two ways
+#  10 20 (1, 2, 3) {'a': 1, 'b': 2, 'c': 3}
diff --git a/3.8/user_input37.py b/3.8/user_input37.py
@@ -0,0 +1,5 @@
+user_input = input()
+print(user_input)
+while user_input:
+   user_input = input()
+   print(user_input)
diff --git a/3.8/user_input38.py b/3.8/user_input38.py
@@ -0,0 +1,2 @@
+while user_input := input():
+   print(user_input)
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		len(obj='hello') # The "obj" keyword argument impairs readability
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		while user_input := input():
		print(user_input)