python ex

Author: Sinrez

stepic/python_fullstack/groupby_example.py

@@ -0,0 +1,51 @@
+import itertools
+
+
+num_list = [1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4]
+
+# print(itertools.groupby(num_list))
+
+# for i, j in itertools.groupby(num_list):
+#     print("i: ", i, "j: ", list(j))
+
+###################################
+
+# print([i for i, j in itertools.groupby(num_list)])
+
+# print([list(j) for i, j in itertools.groupby(num_list)])
+
+# print([(i, list(j)) for i, j in itertools.groupby(num_list)])
+
+####################################
+# print('LAMBDA')
+# print([(i, list(j)) for i, j in itertools.groupby(num_list, lambda x: x * 2)])
+
+######################################
+
+# data = [[0, 'Egg', 10],
+#         [1, 'Egg', 20],
+#         [2, 'Ham', 30],
+#         [3, 'Ham', 40],
+#         [4, 'Ham', 50]]
+
+# for i, j in itertools.groupby(data, lambda x: x[1]):
+#     print(i, list(j))
+
+#########################################
+
+# tpl = (1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4)
+
+# print('TUPLE')
+# print([(i, list(j)) for i, j in itertools.groupby(tpl)])
+
+# print(tuple((i, tuple(j)) for i, j in itertools.groupby(tpl) ))
+
+#########################################
+
+s = 'xxxyyyzzz'
+
+print('STRING')
+
+print([(i, list(j)) for i, j in itertools.groupby(s)]) 
+
+######################