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Tricky Python Questions
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‎tricky questions.ipynb

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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 5,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"False"
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]
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},
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"execution_count": 5,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"d = {\"john\": 40, \"peter\":45}\n",
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"\"John\" in d"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 11,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"5.5\n"
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]
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}
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],
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"source": [
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"x = 1/2.0 + 3 //3 + 4 ** 1\n",
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"print(x)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 37,
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"metadata": {},
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"outputs": [
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{
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"ename": "NameError",
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"evalue": "name 'a' is not defined",
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"output_type": "error",
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"traceback": [
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"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
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"\u001b[1;31mNameError\u001b[0m Traceback (most recent call last)",
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"\u001b[1;32m<ipython-input-37-5206caf6d3cc>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m 1\u001b[0m \u001b[0ma\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;33m{\u001b[0m\u001b[1;36m1\u001b[0m\u001b[1;33m:\u001b[0m \u001b[1;34m\"A\"\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m2\u001b[0m\u001b[1;33m:\u001b[0m \u001b[1;34m\"B\"\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m3\u001b[0m\u001b[1;33m:\u001b[0m \u001b[1;34m\"C\"\u001b[0m\u001b[1;33m}\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 2\u001b[0m \u001b[1;32mdel\u001b[0m \u001b[0ma\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 3\u001b[1;33m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0ma\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
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"\u001b[1;31mNameError\u001b[0m: name 'a' is not defined"
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]
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}
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],
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"source": [
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"a = {1: \"A\", 2: \"B\", 3: \"C\"}\n",
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"del a\n",
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"print(a)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 36,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"{1: 5, 2: 3, 5: 6}\n",
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"{1: 5, 2: 3}\n"
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]
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}
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],
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"source": [
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"a = {1:5, 2:3, 3:4, 5:6}\n",
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"a.pop(3)\n",
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"print(a)\n",
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"a.popitem()\n",
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"print(a)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 19,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"4\n"
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]
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}
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],
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"source": [
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"a = {}\n",
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"a[1]=1\n",
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"a['1']=2\n",
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"a[1] = a[1]+1\n",
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"count= 0\n",
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"for i in a:\n",
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" count+=a[i]\n",
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"print(count)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 20,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"[2]\n"
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]
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}
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],
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"source": [
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"lst = [1,2,3,4]\n",
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"print(lst[-3:-2])"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 25,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"[(3, 1), (4, 2), (4, 1), (5, 2)]\n"
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]
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}
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],
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"source": [
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"s1=[3,4]\n",
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"s2=[1,2]\n",
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"s3=list()\n",
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"i=0\n",
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"j=0\n",
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"for i in s1:\n",
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" for j in s2:\n",
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" s3.append((i,j))\n",
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" i+=1\n",
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" j+=1\n",
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"print(s3)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 26,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"{'Numbers': {1: 56, 3: 7}, 'Letters': {4: 'B'}}\n"
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]
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}
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],
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"source": [
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"numbers = {}\n",
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"letters = {}\n",
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"comb = {}\n",
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"numbers[1] = 56\n",
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"numbers[3] = 7\n",
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"letters[4]='B'\n",
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"comb['Numbers'] = numbers\n",
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"comb['Letters'] = letters\n",
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"print(comb)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 27,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"[1, 3, 2, 1, 3, 2]"
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]
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},
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"execution_count": 27,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"list1 = [1,3,2]\n",
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"list1*2"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 28,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"0"
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]
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},
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"execution_count": 28,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"A = 16\n",
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"B = 15\n",
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"A%B//A"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 31,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"5\n"
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]
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}
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],
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"source": [
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"numbers = [1,2,3,4]\n",
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"numbers.append([5,6,7,8])\n",
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"print(len(numbers))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 32,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"False"
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]
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},
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"execution_count": 32,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"list1 = [11,2,23]\n",
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"list2 = [11,2,2]\n",
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"list1<list2"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": []
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.7.3"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

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