2020-10-19 21:08:55

docs/da/079.md

@@ -4,7 +4,7 @@
 
 对于 **C** 语言，代码一般要先编译，再执行。
 
-```
+```py
 .c -> .exe
 ```
 
@@ -12,7 +12,7 @@
 
 shell 脚本
 
-```
+```py
 .sh -> interpreter
 ```
 
@@ -20,13 +20,13 @@ shell 脚本
 
 **Python, Java** 等语言先将代码编译为 byte code（不是机器码），然后再处理：
 
-```
+```py
 .py -> .pyc -> interpreter
 ```
 
 ## eval 函数
 
-```
+```py
 eval(statement, glob, local) 
 ```
 
@@ -34,7 +34,7 @@ eval(statement, glob, local)
 
 In [1]:
 
-```
+```py
 a = 1
 
 eval("a+1")
@@ -43,7 +43,7 @@ eval("a+1")
 
 Out[1]:
 
-```
+```py
 2
 ```
 
@@ -51,7 +51,7 @@ Out[1]:
 
 In [2]:
 
-```
+```py
 local = dict(a=2)
 glob = {}
 eval("a+1", glob, local)
@@ -60,7 +60,7 @@ eval("a+1", glob, local)
 
 Out[2]:
 
-```
+```py
 3
 ```
 
@@ -68,7 +68,7 @@ Out[2]:
 
 ## exec 函数
 
-```
+```py
 exec(statement, glob, local) 
 ```
 
@@ -76,7 +76,7 @@ exec(statement, glob, local)
 
 In [3]:
 
-```
+```py
 a = 1
 
 exec("b = a+1")
@@ -85,14 +85,14 @@ print b
 
 ```
 
-```
+```py
 2
 
 ```
 
 In [4]:
 
-```
+```py
 local = dict(a=2)
 glob = {}
 exec("b = a+1", glob, local)
@@ -101,7 +101,7 @@ print local
 
 ```
 
-```
+```py
 {'a': 2, 'b': 3}
 
 ```
@@ -114,13 +114,13 @@ print local
 
 ## compile 函数生成 byte code
 
-```
+```py
 compile(str, filename, mode)
 ```
 
 In [5]:
 
-```
+```py
 a = 1
 c = compile("a+2", "", 'eval')
 
@@ -130,13 +130,13 @@ eval(c)
 
 Out[5]:
 
-```
+```py
 3
 ```
 
 In [6]:
 
-```
+```py
 a = 1
 c = compile("b=a+2", "", 'exec')
 
@@ -147,7 +147,7 @@ b
 
 Out[6]:
 
-```
+```py
 3
 ```
 
@@ -155,14 +155,14 @@ Out[6]:
 
 In [7]:
 
-```
+```py
 import ast
 
 ```
 
 In [8]:
 
-```
+```py
 tree = ast.parse("a+2", "", "eval")
 
 ast.dump(tree)
@@ -171,7 +171,7 @@ ast.dump(tree)
 
 Out[8]:
 
-```
+```py
 "Expression(body=BinOp(left=Name(id='a', ctx=Load()), op=Add(), right=Num(n=2)))"
 ```
 
@@ -179,7 +179,7 @@ Out[8]:
 
 In [9]:
 
-```
+```py
 tree.body.right.n = 3
 
 ast.dump(tree)
@@ -188,13 +188,13 @@ ast.dump(tree)
 
 Out[9]:
 
-```
+```py
 "Expression(body=BinOp(left=Name(id='a', ctx=Load()), op=Add(), right=Num(n=3)))"
 ```
 
 In [10]:
 
-```
+```py
 a = 1
 c = compile(tree, '', 'eval')
 
@@ -204,7 +204,7 @@ eval(c)
 
 Out[10]:
 
-```
+```py
 4
 ```
 
@@ -212,13 +212,13 @@ Out[10]:
 
 In [11]:
 
-```
+```py
 ast.literal_eval("[10.0, 2, True, 'foo']")
 
 ```
 
 Out[11]:
 
-```
+```py
 [10.0, 2, True, 'foo']
 ```