minor changes

ipynb/pres01_intro_language.ipynb

@@ -554,7 +554,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.3"
+   "version": "3.8.10"
   }
  },
  "nbformat": 4,

ipynb/pres032_functions_final.ipynb

@@ -398,26 +398,23 @@
 
 %% Cell type:markdown id: tags:
 
 ## `lambda` keyword and anonymous functions
 
-These functions are called anonymous because they are not declared by using the `def` keyword but with the `lambda` keyword so they have not name.
+The `lambda` functions are called anonymous because they have no name as they are not declared by using the `def` keyword.
 
 - Lambda forms can take any number of arguments but return just one value in the form of an expression. They cannot contain commands or multiple expressions.
 - Lambda form is used in functional programming (but it is usually better to use list comprehension) and for [callbacks in GUI](https://pythonconquerstheuniverse.wordpress.com/2011/08/29/lambda_tutorial/).
 
 %% Cell type:code id: tags:
 
 ``` python
 f = lambda x, y: x + y
-f(1, 2)
+print(f(1, 2))
+print(f.__name__)
 ```
 
-%%%% Output: execute_result
-
-    3
-
 %% Cell type:markdown id: tags:
 
 ## Example of the builtin function `print`
 
 ```text
@@ -431,29 +428,5 @@
 sep:   string inserted between values, default a space.
 end:   string appended after the last value, default a newline.
 flush: whether to forcibly flush the stream.
 Type:      builtin_function_or_method
 ```
-
-%% Cell type:code id: tags:
-
-``` python
-print('hello', 'Eric')
-```
-
-%% Cell type:code id: tags:
-
-``` python
-print('hello', 'Eric', sep='_', end='')
-print('.')
-```
-
-%% Cell type:markdown id: tags:
-
-## Input from Keyboard (builtin function `input`)
-
-%% Cell type:code id: tags:
-
-``` python
-answer = input("what's your name ?")
-print("your name is ", answer)
-```

ipynb/pres07_data_struct.ipynb

@@ -122,16 +122,21 @@
 
 %% Cell type:code id: tags:
 
 ``` python
 # lists comprehensions can be cascaded
-[(x,y) for x in [1,2] for y in ['a','b'] ]
-```
+l1 = [(x,y) for x in [1,2] for y in ['a','b'] ]
+print(l1)
 
-%%%% Output: execute_result
+# Equivalent without list comprehensions
+l2 = []
+for x in [1,2]:
+    for y in ['a','b']:
+        l2.append((x, y))
 
-    [(1, 'a'), (1, 'b'), (2, 'a'), (2, 'b')]
+assert l1 == l2
+```
 
 %% Cell type:markdown id: tags:
 
 ### Do it yourself (advanced)
 
@@ -310,11 +315,11 @@
 ns.pop()
 ```
 
 %%%% Output: execute_result
 
-    11
+    9
 
 %% Cell type:markdown id: tags:
 
 ## Complexity :