資源簡介
最近在學習python的pandas用,視頻是麥子學院人工智能的課程

代碼片段和文件信息
#?coding:?utf-8
#?In[8]:
a=5
b=“dfs“
c=5.6
print(type(a))
print(type(b))
print(type(c))
a=str(a)
print(“changed:%s“%(type(a)))
#?In[16]:
a=[5“dfs““ok“8634]
a.append(“tom“)
a.append(3)
a.append(“Jerry“)
length=len(a)
print(“length:%d“%(length))
print(a[0])
print(a[-1])#最后一個元素
print(“print2-5:“)
print(a[2:6])
print(“print4-:“)
print(a[4:])
#?In[29]:
a=[51464]
for?val?in?a:
????print(val)
i=0
while?i ????print(“while%d“%(a[i]))
????i+=1
for?i?in?range(10):
????print(i)
#?In[40]:
a=[514647786900021]
if?5?in?a:
????print(“5?in?a?true“)
#dict
students={}
students[“Tom“]=100
students[“Jerry“]=80
students[“Bob“]=95
students[“Alice“]=76
print(students)
print(students.keys())
arr={
????
????“jj“:55
????“ok“:0
}
print(arr)
for?val?in?a:
????if(val?in?arr):
????????arr[val]=arr[val]+1
????else:
????????arr[val]=1
print(arr)
????
#?In[18]:
f=open(“test_write.txt““w“)#用“w”的方式打開,如果該文件沒有,則自動創建
f.write(“123444“)
f.write(‘\n‘)
f.write(“練偉成“)
f.close()
f=open(“test_write.txt““r“)
text=f.read()
print(text)
f.close()
print(“************“)
l=[]
f=open(“text_read0.csv““r“)
data=f.read()
print(type(data))
data=data.split(“\n“)#
print(data)
print(type(data))
print(“cut?again“)
for?row?in?data:
????row=row.split(‘‘)
????l.append(row)
print(l)
ans=[]
for?row?in?l:
????ans.append(row[0])
print(ans)
f.close()
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????1518814??2018-03-05?10:08??food_info.csv
?????文件????????1432??2018-03-29?16:05??python_ba
評論
共有 條評論