2020-10-19 21:08:55

docs/da/025.md

@@ -6,7 +6,7 @@
 
 看下面这段代码：
 
-```
+```py
 import math
 
 while True:
@@ -25,7 +25,7 @@ while True:
 
 In [1]:
 
-```
+```py
 import math
 
 while True:
@@ -38,12 +38,12 @@ while True:
 
 ```
 
-```
+```py
 > -1
 
 ```
 
-```
+```py
 ---------------------------------------------------------------------------
 ValueError                                Traceback (most recent call last)
 <ipython-input-1-ceb8cf66641b> in <module>()
@@ -59,7 +59,7 @@ ValueError: math domain error
 
 一旦报错，程序就会停止执行，如果不希望程序停止执行，那么我们可以添加一对 `try & except`：
 
-```
+```py
 import math
 
 while True:
@@ -81,7 +81,7 @@ while True:
 
 In [2]:
 
-```
+```py
 import math
 
 while True:
@@ -97,7 +97,7 @@ while True:
 
 ```
 
-```
+```py
 > -1
 the value must be greater than 0
 > 0
@@ -110,7 +110,7 @@ log10(1.0) = 0.0
 
 ## 捕捉不同的错误类型
 
-```
+```py
 import math
 
 while True:
@@ -130,7 +130,7 @@ while True:
 
 In [3]:
 
-```
+```py
 import math
 
 while True:
@@ -146,12 +146,12 @@ while True:
 
 ```
 
-```
+```py
 > 1
 
 ```
 
-```
+```py
 ---------------------------------------------------------------------------
 ZeroDivisionError                         Traceback (most recent call last)
 <ipython-input-3-7607f1ae6af9> in <module>()
@@ -172,7 +172,7 @@ ZeroDivisionError: float division by zero
 
 In [4]:
 
-```
+```py
 import math
 
 while True:
@@ -188,7 +188,7 @@ while True:
 
 ```
 
-```
+```py
 > 1
 invalid value
 > 0
@@ -207,7 +207,7 @@ invalid value
 
 In [5]:
 
-```
+```py
 import math
 
 while True:
@@ -223,7 +223,7 @@ while True:
 
 ```
 
-```
+```py
 > 1
 invalid value
 > -1
@@ -238,7 +238,7 @@ invalid value
 
 In [6]:
 
-```
+```py
 import math
 
 while True:
@@ -256,7 +256,7 @@ while True:
 
 ```
 
-```
+```py
 > 1
 the value must not be 1
 > -1
@@ -273,7 +273,7 @@ the value must be greater than 0
 
 In [7]:
 
-```
+```py
 import math
 
 while True:
@@ -293,7 +293,7 @@ while True:
 
 ```
 
-```
+```py
 > 1
 the value must not be 1
 > -1
@@ -310,12 +310,12 @@ the value must be greater than 0
 
 In [8]:
 
-```
+```py
 float('a')
 
 ```
 
-```
+```py
 ---------------------------------------------------------------------------
 ValueError                                Traceback (most recent call last)
 <ipython-input-8-99859da4e72c> in <module>()
@@ -328,7 +328,7 @@ ValueError: could not convert string to float: a
 
 In [9]:
 
-```
+```py
 import math
 
 while True:
@@ -351,7 +351,7 @@ while True:
 
 ```
 
-```
+```py
 > 1
 the value must not be 1
 > -1
@@ -366,19 +366,19 @@ could not convert 'aa' to float
 
 这里，`exc.message` 显示的内容是异常对应的说明，例如
 
-```
+```py
 ValueError: could not convert string to float: a 
 ```
 
 对应的 `message` 是
 
-```
+```py
 could not convert string to float: a 
 ```
 
 当我们使用 `except Exception` 时，会捕获所有的 `Exception` 和它派生出来的子类，但不是所有的异常都是从 `Exception` 类派生出来的，可能会出现一些不能捕获的情况，因此，更加一般的做法是使用这样的形式：
 
-```
+```py
 try:
     pass
 except:
@@ -394,7 +394,7 @@ except:
 
 In [10]:
 
-```
+```py
 class CommandError(ValueError):
     pass
 
@@ -404,7 +404,7 @@ class CommandError(ValueError):
 
 In [11]:
 
-```
+```py
 valid_commands = {'start', 'stop', 'pause'}
 
 while True:
@@ -414,12 +414,12 @@ while True:
 
 ```
 
-```
+```py
 > bad command
 
 ```
 
-```
+```py
 ---------------------------------------------------------------------------
 CommandError                              Traceback (most recent call last)
 <ipython-input-11-0e1f81a1136d> in <module>()
@@ -434,7 +434,7 @@ CommandError: Invalid commmand: bad command
 
 我们可以使用 `try/except` 块来捕捉这个异常：
 
-```
+```py
 valid_commands = {'start', 'stop', 'pause'}
 
 while True:
@@ -457,7 +457,7 @@ try/catch 块还有一个可选的关键词 finally。
 
 In [12]:
 
-```
+```py
 try:
     print 1
 finally:
@@ -465,7 +465,7 @@ finally:
 
 ```
 
-```
+```py
 1
 finally was called.
 
@@ -475,7 +475,7 @@ finally was called.
 
 In [13]:
 
-```
+```py
 try:
     print 1 / 0
 finally:
@@ -483,12 +483,12 @@ finally:
 
 ```
 
-```
+```py
 finally was called.
 
 ```
 
-```
+```py
 ---------------------------------------------------------------------------
 ZeroDivisionError                         Traceback (most recent call last)
 <ipython-input-13-87ecdf8b9265> in <module>()
@@ -504,7 +504,7 @@ ZeroDivisionError: integer division or modulo by zero
 
 In [14]:
 
-```
+```py
 try:
     print 1 / 0
 except ZeroDivisionError:
@@ -514,7 +514,7 @@ finally:
 
 ```
 
-```
+```py
 divide by 0.
 finally was called.