Add application file

app.py

@@ -0,0 +1,81 @@
+import gradio as gr
+import pandas as pd
+import re
+
+def extract_timestamp(filename):
+    # 从文件名中提取数字时间戳
+    match = re.search(r'(\d+)', filename)
+    if match:
+        return int(match.group(1))
+    return 0
+
+def csv_to_dict(df):
+    df = df.fillna('')
+    res = {}
+    for i, row in df.iterrows():
+        if row['CRN'] not in res:
+            res[ row['CRN' ] ] = {
+                'Instructor': row['Instructor'],
+                'Max': row['Max'],
+            }
+    return res
+
+def compare_dicts(dict_a, dict_b):
+    # 遍历两个字典，查找Instructor或Max不同的CRN
+    changed = []
+    all_crns = set(dict_a.keys()).union(set(dict_b.keys()))
+    
+    for crn in all_crns:
+        instructor_a = dict_a.get(crn, {}).get('Instructor', None)
+        instructor_b = dict_b.get(crn, {}).get('Instructor', None)
+        max_a = dict_a.get(crn, {}).get('Max', None)
+        max_b = dict_b.get(crn, {}).get('Max', None)
+        
+        # 如果Instructor或Max不同，则记录CRN
+        if instructor_a != instructor_b:
+            msg = ' * CRN: {}, Instructor change: {} --> {}'.format(crn, instructor_a, instructor_b)
+            changed.append(msg)
+        if max_a != max_b:
+            msg = ' * CRN: {}, Max change: {} --> {}'.format(crn, max_a, max_b)
+            changed.append(msg)
+    
+    return changed
+
+def process_files(files):
+    if len(files) < 2:
+        return "Please upload at least 2 files."
+    
+    # 根据文件名中的时间戳进行排序
+    files_sorted = sorted(files, key=lambda x: extract_timestamp(x.name))
+    
+    result = []
+    
+    # 对排序后的文件进行两两比较
+    for i in range(len(files_sorted) - 1):
+        df_older = pd.read_csv(files_sorted[i].name)
+        df_newer = pd.read_csv(files_sorted[i + 1].name)
+        
+        dict_a = csv_to_dict(df_older)
+        dict_b = csv_to_dict(df_newer)
+
+        f1 = files_sorted[i].name.split('/')[-1]
+        f2 = files_sorted[i+1].name.split('/')[-1]
+        
+        crns = compare_dicts(dict_a, dict_b)
+        if crns:
+            result.append("{} --> {} \n{}".format(f1, f2, "\n".join(crns)))
+        else:
+            result.append("{} --> {} \n * No change.".format(f1, f2))
+
+    return "\n".join(result)
+
+# 使用Gradio构建界面
+gr.Interface(
+    fn=process_files,
+    inputs=gr.Files(label="Upload CCSV files"),
+    outputs="text",
+    title="Course Schedule Tracker",
+    description="Upload multiple CSV files, sort them based on the timestamp in the filenames, compare two adjacent files at a time, and output the CRNs where the Instructor or Max has changed."
+).launch()
+
+