From 9b97c545cda02c0197cc76bf9870014a2578c75f Mon Sep 17 00:00:00 2001
From: meoulove <aiaixixihaha@sina.com>
Date: Mon, 25 Jan 2021 22:55:46 +0800
Subject: [PATCH] group_3_ai

---
 data_generator.py | 52 ++++++++++++++++++++++++++++++++++++++++
 exceptions.py     | 33 ++++++++++++++++++++++++++
 list_comp1.py     | 15 ++++++++++++
 range_dict.py     | 60 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 160 insertions(+)
 create mode 100644 data_generator.py
 create mode 100644 exceptions.py
 create mode 100644 list_comp1.py
 create mode 100644 range_dict.py

diff --git a/data_generator.py b/data_generator.py
new file mode 100644
index 0000000..dbc47f2
--- /dev/null
+++ b/data_generator.py
@@ -0,0 +1,52 @@
+"""
+create a class that given a list of text files will at each iteration return
+the first line of the text only if the file is not suppose to be ignored (see example files below)
+
+example:
+
+lets assume we have the following files and that the first line of each file is the name of the file
+
+files = ["file1.txt", "file2.txt", "ingore_this_file1.txt", "file3.txt", "ingore_this_file1.txt", "file4.txt"]
+
+
+following code should run:
+
+>> my_generator =  DataGenerator(files)
+>> for data in my_generator:
+..      print(data)
+..      if "3" in data:
+..          break
+>>"file1.txt"
+>>"file2.txt"
+>>"file3.txt"
+>> next(my_generator)
+>>"file4.txt"
+
+"""
+
+class DataGenerator():
+    def __init__(self,files):
+        self.data = files
+        self.current_num = 0
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        for item in self.data:
+            if 'ingore' in item:
+                self.data.remove(item)
+        if self.current_num < len(self.data):
+            ret = self.data[self.current_num]
+            self.current_num += 1
+            return ret
+
+files = ["file1.txt", "file2.txt", "ingore_this_file1.txt", "file3.txt", "ingore_this_file1.txt", "file4.txt"]
+
+my_generator =  DataGenerator(files)
+for data in my_generator:
+    print(data)
+    if "3" in data:
+        break
+print('================')
+print(next(my_generator))
diff --git a/exceptions.py b/exceptions.py
new file mode 100644
index 0000000..0e3fe6d
--- /dev/null
+++ b/exceptions.py
@@ -0,0 +1,33 @@
+
+
+"""
+fill in the fucntions so that the catch the appropriate errors and return "caught".
+
+example:
+>> test_list = []
+>> catch_all_exceptions(test_list[10])
+>> "caught"
+
+"""
+
+def catch_all_exceptions(object):
+    catch_index_error(object)
+    catch_value_error(object)
+
+def catch_index_error(object):
+    try:
+        print(object[10])
+    except IndexError:
+        print('caught')
+
+def catch_value_error(object):
+    try:
+        object = str(object)
+        print(int(object))
+    except ValueError:
+        print('caught')
+
+
+test_list = []
+catch_all_exceptions(test_list)
+
diff --git a/list_comp1.py b/list_comp1.py
new file mode 100644
index 0000000..6a735ea
--- /dev/null
+++ b/list_comp1.py
@@ -0,0 +1,15 @@
+def list_comp1(input_data):
+    """
+    make this into a list comprehension
+
+    example:
+    >> list_comp1([1,0,90,40])
+    >> [0,0,1,1]
+    """
+
+    transformed_data = []
+    transformed_data = [0 if i < 10 else 1 for i in [i for i in input_data if i >= 0]]
+    return transformed_data
+
+transformed_data = list_comp1([1,0,90,40])
+print(transformed_data)
\ No newline at end of file
diff --git a/range_dict.py b/range_dict.py
new file mode 100644
index 0000000..363bef9
--- /dev/null
+++ b/range_dict.py
@@ -0,0 +1,60 @@
+
+"""
+
+implemet a child-class of dict called RangeDict that takes pairs of ints; (int, int) which
+signifies a range. eg. (1,10), (30,34).
+Given an int will return the value of the range the int is inside
+
+so if out dict contain the keys (1,10), (30,34), and we run:
+
+>> my_range_dict[7]
+>> (1,10)
+
+furthermore;
+
+when you try to add a range that overlaps with an existing range, for example
+trying to add (5,11) when we have (1,10), overwrite the overlapping span.
+
+>> my_range_dict
+>> {(1,10):1, (30,34): 2}
+>> my_range_dict[(5,11)] = 3
+>> my_range_dict
+>> {(30,34): 2, (5,11):3}
+
+"""
+
+class RangeDict():
+    ranges = [(1,10),(30,34)]
+    keys = [1, 2]
+    dict = {}
+    for i in range(len(ranges)):
+        dict[ranges[i]] = keys[i]
+
+class My_range_dict(RangeDict):
+
+    def __getitem__(self, key):
+        self.key = key
+        for eachRange in self.ranges:
+            if self.key in range(eachRange[0],eachRange[1]+1):
+                print(eachRange)
+
+    def __setitem__(self, key, value):
+        new_range = set(range(key[0],key[1]+1))
+        for each_range in self.ranges:
+            old_range = set(range(each_range[0],each_range[1]+1))
+            if new_range.intersection(old_range):
+                del self.dict[each_range]
+                self.dict[key] = value
+                return self.dict
+            else:
+                self.dict[key] = value
+                return self.dict
+
+    def __call__(self):
+        print(self.dict)
+
+my_range_dict = My_range_dict()
+my_range_dict()
+my_range_dict[7]
+my_range_dict[(20,24)] = 3
+my_range_dict()