String indexing and concatenation
You are presented with one of the earliest known encryption techniques - Caesar cipher. It is based on a simple shift of each letter in a message by a certain number of positions down the given alphabet. For example, given the English alphabet, a shift of 1 for 'xyz' would imply 'yza' and vice versa in case of decryption. Notice that 'z' becomes 'a' in this case.
Thus, encryption/decryption requires two arguments: text and an integer key denoting the shift (key = 1 for the example above).
Your task is to create an encryption function given the English alphabet stored in the alphabet string.
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def encrypt(text, key):
encrypted_text = ''
# Fill in the blanks to create an encrypted text
for char in text.lower():
idx = (alphabet.____(____) + ____) % len(____)
encrypted_text = encrypted_text + alphabet[idx]
return encrypted_text
# Check the encryption function with the shift equals to 10
print(____("datacamp", ____))