For my python programming assignment, I have a starting dictionary called aa2mw. This dictionary contains keys representing various amino acids along with their respective molecular weights. Here is what the dictionary looks like:
aa2mw = {
'A': 89.093, 'G': 75.067, 'M': 149.211, 'S': 105.093, 'C': 121.158,
'H': 155.155, 'N': 132.118, 'T': 119.119, 'D': 133.103, 'I': 131.173,
'P': 115.131, 'V': 117.146, 'E': 147.129, 'K': 146.188, 'Q': 146.145,
'W': 204.225, 'F': 165.189, 'L': 131.173, 'R': 174.201, 'Y': 181.189
}
My task is to create a new dictionary using the same keys as aa2mw but with different values. These new values will be calculated based on a given string of arbitrary length. The calculation involves counting occurrences of each key in the string and dividing it by the length of the string.
I thought about using a loop to avoid manually typing each key into the new dictionary. However, my attempts at combining a loop with dictionary creation resulted in syntax errors. Here is my messy attempt so far:
aaCompositionDict = {key for key in aa2mw.items(): (self.inString.count(key) / len(self.inString))}