文章目錄
- 1.1、結果1 if 條件 else 結果2
- 1.2、(結果2,結果1)[判斷]
- 1.3、{條件值1:結果1,條件值2:結果2}[判斷]
1、三元表達式的三種方法
1.1、結果1 if 條件 else 結果2
tj = 2 > 1
print(" msg1: >") if tj else print(" msg1: <")
msg1 = ">" if tj else "<"
print(" msg1: %s"%msg1)
1.2、(結果2,結果1)[判斷]
tj = 2 > 1
print((" msg3: <"," msg3: >")[tj]) # 注:這裡是先寫else的結果,然後再寫if的結果
msg3 = ("<",">")[tj] # 注:這裡是先寫else的結果,然後再寫if的結果
print(" msg3: %s"%msg3)
1.3、{條件值1:結果1,條件值2:結果2}[判斷]
tj = 2 > 1
print({True:" msg2: >",False:" msg2: <"}[tj])
msg2 = {True:">",False:"<"}[tj]
print(" msg2: %s"%msg2)
2、源代碼
tj = 2 > 1
print(" msg1: >") if tj else print(" msg1: <")
print({True:" msg2: >",False:" msg2: <"}[tj])
print((" msg3: <"," msg3: >")[tj]) # 注:這裡是先寫else的結果,然後再寫if的結果
print("--------------------------------------")
msg1 = ">" if tj else "<"
msg2 = {True:">",False:"<"}[tj]
msg3 = ("<",">")[tj] # 注:這裡是先寫else的結果,然後再寫if的結果
print(" msg1: %s\n msg2: %s\n msg3: %s"%(msg1,msg2,msg3))
3、效果圖