Решения на первый блок

STEP1_Basics/6_Files/file

@@ -0,0 +1,2 @@
+1 2
+2 3

STEP1_Basics/6_Files/main.py

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+a = int(input('Enter a: '))
+b = int(input('Enter b: '))
+
+matrix = [
+	[a, a+1],
+	[b, b+1]
+]
+
+first = True
+for line in matrix:
+	#for el in line:
+	if first == True:
+		f_str = f'{line[0]} {line[1]}\n'
+		first = False
+	else:
+		s_str = f'{line[0]} {line[1]}\n'
+# Write lines
+with open('file', 'w') as f:
+	f.write(f_str)
+	f.write(s_str)
+	f.close()
+
+readed_matrix = []
+with open('file', 'r') as f:
+	for x in f:
+		if x == '' or x == '\n':
+			continue
+		x = x.replace('\n', '')
+		vals = x.split(' ')
+		readed_matrix.append(vals)
+	f.close()
+
+print(f'''
+Original matrix:
+{matrix}
+Readed matrix:
+{matrix}
+''')