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Author: ROBOMASTER-S1

2d lists.py

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+# Let's fully understand what a 2d list is truly all about.
+# A 2d list is a two dimensional array that can hold multiple
+# 2d list array values under a single variable. For example:
+
+my_2d_list=['2d list0'],['2d list0']
+
+print(my_2d_list[0][0])
+print(my_2d_list[1][0])
+
+# If you create a really long 2d list such as this example below,
+# you can force hard line-breaks, but you must use outer square
+# brackets '[]' to surround the entire 2d list values. Note: you
+# must use commas at the end of each 2d list array.
+
+# Example 1:
+
+my_2d_list=['2d list0'],['2d list0'],['2d list0'],['2d list0'],['2d list0'],['2d list0'],['2d list0']
+
+print(my_2d_list[4][0])
+
+# Example 2:
+
+my_2d_list=[ # use a hard line-break make the 2d list look neat and tidy.
+    ['2d list0'],['2d list0'],['2d list0'],
+    ['2d list0'],['2d list0'],['2d list0'],
+    ['2d list0']] # use a hard line-break to add more values to the 2d list.
+
+print(my_2d_list[4][0])
+
+# Create a multi-2d list array like this example below illustrates.
+
+my_multi_2d_list=['Value0','Value1','Value2'],['Value0','Value1','Value2']
+
+print(my_multi_2d_list[0][0])
+print(my_multi_2d_list[0][1])
+print(my_multi_2d_list[0][2])
+
+print(my_multi_2d_list[1][0])
+print(my_multi_2d_list[1][1])
+print(my_multi_2d_list[1][2])
+
+# You can create as many multi-2d list array values as you please.
+# For example:
+
+my_multi_2d_list=[
+    ['Value0','Value1','Value2'],
+    ['Value0','Value1','Value2','Value3'],
+    ['Value0','Value1','Value2','Value3','Value4']] # neat and tidy
+
+print(my_multi_2d_list[0][2])
+print(my_multi_2d_list[1][3])
+print(my_multi_2d_list[2][4])
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+# Now, let's have some multi-2d list fun using a for-loop
+# and see what happens when we execute/run this multi-2d
+# list, for-loop example:
+
+my_multi_2d_list=[
+    ['Value0','Value1','Value2'],
+    ['Value0','Value1','Value2'],
+    ['Value0','Value1','Value2'],
+    ['Value0','Value1','Value2']] # neat and tidy
+
+for i in my_multi_2d_list:
+    print(i[0],i[1],i[2])
+''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
+# Let's create a real, working multi-2d list to see what
+# they are truly all about in a real Python program scenario.
+# We will call our multi-2d list, 'names'. Use the (f') format
+# to make the 'print' statement easier to concatenate strings.
+
+names=[
+    ['Ron','Bob','Tom'],
+    ['John','Mary','Terry'],
+    ['Edie','Freddy','Teddy'],
+    ['Charie','Marty','Harvey']] # neat and tidy
+
+for i in names:
+    print(f'{i[0]}, {i[1]} and {i[2]} went to the store.')
+
+# Let's create a looping sentence tuple with our multi-2d list for-loop
+# example and see what happens when we execute/run this Python
+# program example below.
+
+names=[
+    ['Ron','Bob','Tom'],
+    ['John','Mary','Terry'],
+    ['Edie','Freddy','Teddy'],
+    ['Charie','Marty','Harvey']] # neat and tidy
+
+sentence=(
+    ('went home to have dinner.',
+    'went to the store to buy some food.',
+    'wanted some pizza for breakfast.',
+     'wanted computers for Christmas.',
+     'love their computers.'))
+
+for i in range(4):
+        print(f'{names[i][0]}, {names[i][1]} \
+and {names[i][2]} {sentence[i]}')