Add ch-1 and ch-2 in Python

2 files changed, 127 insertions, 0 deletions

diff --git a/challenge-341/spadacciniweb/python/ch-1.py b/challenge-341/spadacciniweb/python/ch-1.py
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+++ b/challenge-341/spadacciniweb/python/ch-1.py
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+# Task 1: Broken Keyboard
+# Submitted by: Mohammad Sajid Anwar
+# 
+# You are given a string containing English letters only and also you are given broken keys.
+# Write a script to return the total words in the given sentence can be typed completely.
+# 
+# Example 1
+# Input: $str = 'Hello World', @keys = ('d')
+# Output: 1
+# 
+# With broken key 'd', we can only type the word 'Hello'.
+# 
+# Example 2
+# Input: $str = 'apple banana cherry', @keys = ('a', 'e')
+# Output: 0
+# 
+# Example 3
+# Input: $str = 'Coding is fun', @keys = ()
+# Output: 3
+# 
+# No keys broken.
+# 
+# Example 4
+# Input: $str = 'The Weekly Challenge', @keys = ('a','b')
+# Output: 3
+# 
+# Example 5
+# Input: $str = 'Perl and Python', @keys = ('p')
+# Output: 1
+
+import re
+
+def broken_keyboard(str, keys):
+    words = dict.fromkeys( str.split(), 0)
+
+    for w in words.keys():
+       if words[w] > 0:
+           continue
+       for key in keys:
+           if re.search(key, w, re.IGNORECASE):
+               words[w]  += 1
+               break
+
+    print("'%s' (%s) -> %s" % ( str, ', '.join( keys ), len( [w for w, val in words.items() if val == 0]) ) )
+
+if __name__ == "__main__":
+    str = 'Hello World'
+    keys = ('d')
+    broken_keyboard(str, keys)
+
+    str = 'apple banana cherry'
+    keys = ('a', 'e')
+    broken_keyboard(str, keys)
+# 
+    str = 'Coding is fun'
+    keys = ()
+    broken_keyboard(str, keys)
+
+    str = 'The Weekly Challenge'
+    keys = ('a','b')
+    broken_keyboard(str, keys)
+
+    str = 'Perl and Python'
+    keys = ('p')
+    broken_keyboard(str, keys)
diff --git a/challenge-341/spadacciniweb/python/ch-2.py b/challenge-341/spadacciniweb/python/ch-2.py
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index 0000000000..a0d3d07e67
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+++ b/challenge-341/spadacciniweb/python/ch-2.py
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+# Task 2: Reverse Prefix
+# Submitted by: Mohammad Sajid Anwar
+# 
+# You are given a string, $str and a character in the given string, $char.
+# Write a script to reverse the prefix upto the first occurrence of the given $char in the given string $str and return the new string.
+# 
+# Example 1
+# Input: $str = "programming", $char = "g"
+# Output: "gorpmming"
+# 
+# Reverse of prefix "prog" is "gorp".
+# 
+# Example 2
+# Input: $str = "hello", $char = "h"
+# Output: "hello"
+# 
+# Example 3
+# Input: $str = "abcdefghij", $char = "h"
+# Output: "hgfedcbaj"
+# 
+# Example 4
+# Input: $str = "reverse", $char = "s"
+# Output: "srevere"
+# 
+# Example 5
+# Input: $str = "perl", $char = "r"
+# Output: "repl"
+
+def reverse_prefix(str, char):
+    strings = list(str)
+    new_str = ''
+    for n in (range(len(str))):
+        letter = strings.pop(0);
+        new_str += letter
+        if letter == char:
+            new_str = new_str[::-1]
+            break
+    new_str += ''.join( strings )
+
+    print("'%s' '%s' -> '%s'" % (str, char, new_str) )
+
+if __name__ == "__main__":
+    str = "programming"
+    char = "g"
+    reverse_prefix( str, char )
+
+    str = "hello"
+    char = "h"
+    reverse_prefix( str, char )
+
+    str = "abcdefghij"
+    char = "h"
+    reverse_prefix( str, char )
+
+    str = "reverse"
+    char = "s"
+    reverse_prefix( str, char )
+
+    str = "perl"
+    char = "r"
+    reverse_prefix( str, char )
+