Day 5 python串列

今天我们要介绍的是python的串列，所谓的串列就是指将元素用[]包住并且是有顺序性的资料型态。

串列(List)

以下我们介绍几个间单的串列型态以及如果对串列做变化。

data = ["apple","banana","watermelon","orange","grape"]
print(data)

首先我们先宣告一个串列的变数。

data = ["apple","banana","watermelon","orange","grape"]
for i in data:
    print(i)

也可以用昨天所学到的利用FOR回圈来抓取列表里面的每一个元素。

data = ["apple","banana","watermelon","orange","grape"]
for i in data:
    if i == "orange":
        print(i)

如果知道串列的内容，也可以用特定的条件去抓取想要的资料。

data = ["apple","banana","watermelon","orange","grape"]
data1 = ["good","bad","good","good","bad"]
data2 = [50,60,73,81,39]
print(data[0])
print(data1[2])
print(data2[4])

如果知道串列内容以及位址的话也可以直接抓取而不需要用条件抓取，而串列的顺序是从0开始。

data = ["apple","banana","watermelon","orange","grape"]
data1 = ["good","bad","good","good","bad"]
data2 = [50,60,73,81,39]
print(data[0:3])
print(data1[2:4])
print(data2[4])

串列也可以抓取不只单一一个的元素，也可以抓取多个或范围的元素，可以使用[n:n-1]的范围抓取。

data = ["apple","banana","watermelon","orange","grape"]
data1 = ["good","bad","good","good","bad"]
data2 = [50,60,73,81,39]
print(data)
print(data1)
print(data2)
data.append("mango")
data1.append("good")
data2.append(90)
print(data)
print(data1)
print(data2)

也可以对串列做增加的动作，利用.apppend的方式将想要的资料增加进串列里面。

data = ["apple","banana","watermelon","orange","grape"]
data1 = ["good","bad","good","good","bad"]
data2 = [50,60,73,81,39]
print(data)
print(data1)
print(data2)
data.remove("apple")
data1.remove("bad")
data2.remove(39)
print(data)
print(data1)
print(data2)

也可以对串列做删除的动作，利用.remove的方式将想要的资料做删除，如果资料内有相同元素的资料，将会以顺序最前面的开始做删除。