day3.ipynb

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    "Day 3: Register Check\n",
    "\n",
    "Write a function called register_check that checks how many students are in school. The function takes a dictionary as a parameter. If the student is in school, the dictionary says ‘yes’. If the student is not in school, the dictionary says ‘no’. Your function should return the number of students in school. Use the dictionary below. Your function should return 3.\n"
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      "text/plain": [
       "3"
      ]
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   "source": [
    "register = {'Michael': 'yes', 'John': 'no', 'Peter': 'yes', 'Mary': 'yes'}\n",
    "\n",
    "def register_check(register):\n",
    "    # create a list comprehension of register items if their value is yes\n",
    "    check = [k for k,v in register.items() if v == 'yes']\n",
    "    # return the length of list as count method\n",
    "    return len(check)\n",
    "\n",
    "\n",
    "register_check(register)"
   ]
  },
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   "metadata": {},
   "source": [
    "Extra Challenge: Lowercase Names\n",
    "\n",
    "You are given a list of names above. This list is made up of names of lowercase and uppercase letters. Your task is to write a code that will return a tuple of all the names in the list that have only lowercase letters. Your tuple should have names sorted alphabetically in descending order. Using the list above, your code should return:"
   ]
  },
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   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
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    {
     "data": {
      "text/plain": [
       "['kerry', 'dickson', 'carol', 'adam']"
      ]
     },
     "execution_count": 36,
     "metadata": {},
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    }
   ],
   "source": [
    "names = [\"kerry\", \"dickson\", \"John\", \"Mary\", \"carol\", \"Rose\", \"adam\"]\n",
    "\n",
    "def to_lowercase(names):\n",
    "    # create a list of names in lower case\n",
    "    islowercase = [c for c in names if c == c.lower()]\n",
    "    # return list as its already sorted\n",
    "    return islowercase\n",
    "\n",
    "\n",
    "to_lowercase(names)"
   ]
  }
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