Python: Check whether it follows the sequence given in the patterns array
Python: Array Exercise-16 with Solution
Write a Python program to check whether it follows the sequence given in the patterns array.
Pattern example:
For color1 = ["red", "green", "green"] and patterns = ["a", "b", "b"]
the output should be samePatterns(color1, patterns) = true;
For color2 = ["red", "green", "greenn"] and patterns = ["a", "b", "b"]
the output should be samePatterns (strings, color2) = false.
Sample Solution:
Python Code :
def is_samePatterns(colors, patterns):
if len(colors) != len(patterns):
return False
sdict = {}
pset = set()
sset = set()
for i in range(len(patterns)):
pset.add(patterns[i])
sset.add(colors[i])
if patterns[i] not in sdict.keys():
sdict[patterns[i]] = []
keys = sdict[patterns[i]]
keys.append(colors[i])
sdict[patterns[i]] = keys
if len(pset) != len(sset):
return False
for values in sdict.values():
for i in range(len(values) - 1):
if values[i] != values[i+1]:
return False
return True
print(is_samePatterns(["red",
"green",
"green"], ["a",
"b",
"b"]))
print(is_samePatterns(["red",
"green",
"greenn"], ["a",
"b",
"b"]))
Sample Output:
True False
Python Code Editor:
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Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
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