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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def decrypt_ige(cipher_text, key, iv):
 """ Decrypts the given text in 16-bytes blocks by using the given key and 32-bytes initialization vector. """

        if cryptg:
            return cryptg.decrypt_ige(cipher_text, key, iv)
        if libssl.decrypt_ige:
            return libssl.decrypt_ige(cipher_text, key, iv)

        iv1 = iv[:len(iv) // 2]
        iv2 = iv[len(iv) // 2:]

        aes = pyaes.AES(key)

        plain_text = []
        blocks_count = len(cipher_text) // 16

        cipher_text_block = [0] * 16
        for block_index in range(blocks_count):
            for i in range(16):
                cipher_text_block[i] = \
                    cipher_text[block_index * 16 + i] ^ iv2[i]

            plain_text_block = aes.decrypt(cipher_text_block)

            for i in range(16):
                plain_text_block[i] ^= iv1[i]

            iv1 = cipher_text[block_index * 16:block_index * 16 + 16]
            iv2 = plain_text_block

            plain_text.extend(plain_text_block)

        return bytes(plain_text)