Session 2: Python Data Types, Condition and double loops
Session 2.2 Data Types Boolean Condition
1 Boolean and Condition Basic
Booleans represent one of two values: True or False
For learn more and practic Boolean, please check Python Boolean
- [Mission-2.8] Try Comparatoers in python
Python has below comparatoers
Try below python code and remember their result is True or False
a=True
b=False
print("a=",a)
print("b=",b)
print("is a equals b",a==b)
print("is a not equals b", a!=b)
x=2
y=3
print ("x={} y={}".format(x,y))
print("is x equals y",x==y)
print("is x greater than y", x>y)
print("ix x smaller than y", x<y)
- [Mission 2.9] use if ... elif..else with boolean to Check if you are in water or not
To learn Python Conditions please check Python If…Else Try blow code in Minecraft
from mcpi_e.minecraft import Minecraft
from mcpi_e import block
serverAddress = "localhost" # change to your minecraft server
playerName = "yourname"
pythonApiPort = 4711
mc = Minecraft.create(serverAddress,pythonApiPort,playerName)
pos = mc.player.getPos()
x = pos.x
y = pos.y
z = pos.z
blockTypeId=mc.getBlock(x,y,z)
if(blockTypeId==block.WATER.id):
mc.postToChat("["+playerName+"]: I am swimming!")
update upper code using more conditions with elif and else
...
blockTypeId=mc.getBlock(x,y,z)
if(blockTypeId==block.WATER.id):
mc.postToChat("["+playerName+"]: I am swimming!")
elif(blockTypeId==block.AIR.id):
mc.postToChat("["+playerName+"]: I am flying!")
else:
mc.postToChat("[{}]: I am on block {}".format(playerName,blockTypeId))
- [Mission 2.10] Use Logical Operators and or not
Learn more could check python logical operators
Try below code with and to validate if blockTypeId is valid or not.
# example of and
if(blockTypeId <0 and blockTypeId >252):
print("It's not a valid blockId")
below code use or to check if you are on the ground
# example of or
if(blockTypeId ==block.DIRT.id or blockTypeId == block.GRASS.id):
mc.postToChat("I am on the ground.")
below code user not to reverse True or False
not(True) == False
not(False) == True
# example of not
if(not(blockTypeId ==block.WATER.id)):
mc.postToChat("I am not in water.")
- [Mission 2.11] Check if you are in some area
Complete the code to check if you are in your home
#step 1 get your home location and size
homeX=?
homeY=?
homeZ=?
homeWidth=10
homeHeight=5
homeLength=15
pos=mc.player.getTilePos()
insideX = homeX <pos.x < homeX+homeWidth
insideY = #todo
insideZ = # toto
if(inside):
print("I am in my home")
else:
print("I am out of my home")
2 While loop & Double loops
You could put one loop in another loop, it call double loop.
- [Mission 2.12] use loop build a wall
let’s start build a tower with single loop
from mcpi_e.minecraft import Minecraft
from mcpi_e import block
serverAddress = "localhost" # change to your minecraft server if different
playerName = "yourusername" # change to your name
pythonApiPort = 4711
mc = Minecraft.create(serverAddress,pythonApiPort,playerName)
pos = mc.player.getTilePos()
x = pos.x
y = pos.y
z = pos.z
#build a tower use loop
for h in range(5):
print("h=",h)
mc.setBlock(x,y+h,z,block.STONE.id)
you could build couple of tower to make it wall
for h in range(5):
print("h=",h)
mc.setBlock(x,y+h,z,block.STONE.id)
mc.setBlock(x+1,y+h,z,block.STONE.id)
mc.setBlock(x+2,y+h,z,block.STONE.id)
mc.setBlock(x+3,y+h,z,block.STONE.id)
mc.setBlock(x+4,y+h,z,block.STONE.id)
- [Mission 2.13] Using double loop build a wall
Try To use double loop:
for h in range(5):
for w in range(5):
print("h={} w={}".format(h,w))
mc.setBlock(x+w,y+h,z,block.STONE.id)
- [Mission 2.14] Add condition to your code of build wall
you could put some pattern on your wall, add below code to your missiion 2.13 code
... loop
...
if(w==y):
mc.setBlock(x+w,y+h,z,block.BEDROCK.id)
- [Mission-2.15] Build a 5x5x5 Cube
you need 3 layers of loop, see below example of add 3 layer of loop on mission 2.3.
id=103
for k in range(0,5):
for j in range(0,5):
for i in range(0,5):
mc.setBlock(x+j,y+i,z+k,id)
- [Mission-2.16] Using double loop to explore the map
create a map, or use a map mods, then try to use python code move your player to exploer the map x from -1000 to 1000 step 75 z from -1000 to 1000 step 75 you need stay each place for 5 sec waiting for the view be loaded
...
import time
...
for x in range(-1000,1000,75):
mc.player.setTilePos(x,y,z)
time.sleep(5) #waiting the world data lod
- [Mission-2.17] Using while loop
while loop is dangerous than for loop, because it possible never ending running.
Check more details about while loop
Below is a simple while loop, i will increase 1 in each loop, when i=6, the i<6 is false, the while loop will stop.
i = 1
while i < 6:
print(i)
i += 1 # this make i increase, and when i <6 is false, the while loop will stop.
Below is a example of a infinity while loop, it will running until you close the shell window or press ctrl + C to stop it.
from random import *
flower = 38
while True:
x, y, z = mc.playerEn.getPos()
blockId= mc.getBlock(x, y, z)
print("current block:" + str(mc.getBlock(x, y, z)))
if(blockId==0 or blockId ==78):
mc.setBlock(x, y, z, flower,randrange(8))
sleep(1) # wait 1 sec to continue
- [homework] [Mission-2.18] Use double loop and condition refactor build house code
In the session 1 Mission-1.10, if you didn’t use double loop in the code, please update the code with double loop.
Also try use if condition check in your code.
- [Challenge] [Mission-2.19] Build a pyramid in Minecraft
Modified your code in mission-2.15, build a pyramid, your code should able to build any size of pyramid.
hints:
- need triple loop
- you could test form small number
- you could print it out, or add time.sleep(1) to slow down the setBlock see where you block be set.
please show you work by send your pyramid’s screenshot and your script to the teacher. stoneskin@gmail.com
