如何解决使用pathlib和for循环重命名文件夹中的文件
我用Python编写了以下重命名工具。直到我在for循环中添加os.chdir为止，我无意间将所有文件都移到了一个目录，这使它更好地工作并将每个重命名的文件保留在正确的文件夹中。但是我真的不明白为什么没有os.chdir的这个脚本会将我所有的文件都移动到一个目录中的逻辑，有人可以帮助我理解吗？谢谢。
import React,{ Component } from 'react';
import { View,StyleSheet,Dimensions,Image,BackHandler,AsyncStorage,FlatList,ScrollView,ImageBackground,TextInput,Alert,Modal } from 'react-native';
import Icon from 'react-native-vector-icons/MaterialIcons';
import {
responsiveHeight,responsiveWidth,responsiveFontSize
} from "react-native-responsive-dimensions";
import { Button,Text } from 'native-base';
import { TouchableOpacity,TapGestureHandler } from 'react-native-gesture-handler';
import FontAwesomeIcon from 'react-native-vector-icons/FontAwesome';
import AnimatedLoader from "react-native-animated-loader";
import AwesomeAlert from 'react-native-awesome-alerts';
import { WebView } from 'react-native-webview';
import CustomHeader from '../../CustomeHeader';
import { IMAGE } from '../../../constants/Image';
const { width,height } = Dimensions.get("window");
const BannerWidth = Dimensions.get('window').width - 20;
const BannerHeight = 150;
const Entities = require('html-entities').XmlEntities;
class MyCartScreen extends Component {
constructor(props) {
super(props);
this.state = {
coupon: '',count: 0,productlist: '',isLoading: false,showModal: false,push_array: '',user_auth: '',data_emty_check: false,showAlert1: false,Msg: '',};
}
componentDidMount() {
this.setState({ isLoading: true });
this.getCartItem();
}
getCartItem = async () => {
AsyncStorage.getItem('auth_hash',(err,res) => {
AsyncStorage.getItem('cartsession',cartres) => {
//console.log(cartres + 'dfdfdf');
let newProduct = JSON.parse(cartres);
if (newProduct == '' || newProduct == null) {
//console.log(res);
fetch('https://swissmade.direct/wp-json/swissmade/cart/items',{
method: 'POST',headers: {
'Accept': 'application/json','Content-Type': 'application/json',},body: JSON.stringify({
auth_hash: JSON.parse(res)
}),})
.then((response) => response.json())
.then((resp) => {
//console.log(resp);
if (resp.error == false) {
AsyncStorage.setItem('cartsession',JSON.stringify(resp.items));
this.setState({
productlist: resp.items,isLoading: false
});
//console.log(this.state.productlist)
} else {
this.setState({
isLoading: false,data_emty_check: true
});
//this.props.navigation.navigate("Home");
}
})
.catch(err => {
alert("Something Went Wronggg");
});
} else {
this.setState({
productlist: JSON.parse(cartres),isLoading: false
});
}
});
});
}
_onNavigationStateChange(webViewState) {
//console.log(webViewState);
}
renderCategory = ({ item,index }) => {
const entities = new Entities();
const price = (item.price * item.qty).toFixed(2);
const p_id = item.p_id;
var img = { 'uri': item.thumbnail };
//this.setState({ [`count${index}`]: item.qty })
return (
<View style={styles.childdiv} elevation={5}>
<Image source={img} style={styles.moreImg} />
<View style={{ flexDirection: 'column',padding: 5,width: responsiveWidth(55),justifyContent: 'space-between' }}>
<Text style={styles.userNmae}>{entities.decode(item.title)} </Text>
<View style={{ flexDirection: 'row',justifyContent: 'space-between',alignItems: 'center' }}>
<Text style={styles.price}>{entities.decode(item.currency)} {price}</Text>
<View style={{ flexDirection: 'row',justifyContent: 'space-between' }}>
<TouchableOpacity onPress={() => this.decrement(index,p_id)}>
<Image source={require('../../../../assets/minus.png')}
style={{ width: 25,height: 25,marginTop: 10 }} />
</TouchableOpacity>
<Text style={{ fontSize: 15,margin: 10,color: 'black' }}>{item.qty}</Text>
<TouchableOpacity onPress={() => this.increment(index,p_id)}>
<Image source={require('../../../../assets/plus.png')}
style={{ width: 25,marginTop: 10 }} />
</TouchableOpacity>
</View>
{/* <View style={{ backgroundColor: 'rgba(255,0.8)',height: 20,width: 20,alignItems: 'center',justifyContent: 'center' }}>
<Text style={{ fontSize: 15,margin: 2,color: 'white' }}>{item.qty}</Text>
</View> */}
</View>
</View>
<FontAwesomeIcon style={styles.navItemStyle} name="trash" size={22} onPress={() => this.trashItem(item.p_id,item.v_id,item.qty)} />
</View>
)
}
// showAlert1 = () => {
// this.setState({
// showAlert1: true
// });
// };
// hideAlert = () => {
// this.setState({
// showAlert1: false
// });
// };
render() {
//const { showAlert1 } = this.state;
// const { Msg } = this.state;
return (
<View style={styles.container}>
<CustomHeader title="My Cart" navigation={this.props.navigation} />
<Modal
visible={this.state.showModal}
onRequestClose={() => this.setState({ showModal: false })}
>
<View style={{ position: 'absolute',top: "50%",right: 0,left: 0 }}>
</View>
<WebView
source={{ uri: `https://swissmade.direct/?api_addtocart=1&items=${this.state.push_array}&user=${this.state.expire_time}` }}
onNavigationStateChange={this._onNavigationStateChange.bind(this)}
/>
</Modal>
{
this.state.data_emty_check ?
<View style={{ backgroundColor: '#fff',margin: 5,flex: 1,justifyContent: 'center',alignItems: 'center' }}>
<Image
source={IMAGE.ICON_CART_MENU}
resizeMode='contain'
style={{ width: 60,height: 60 }}
/>
<Text style={{ fontSize: responsiveFontSize(3),padding: 10 }}>Your cart is currently empty</Text>
<Button info onPress={() => this.props.navigation.navigate('Feed')}><Text> Return To Shop </Text></Button>
</View>
:
<View style={{ backgroundColor: '#fff',margin: 5 }}>
<View style={styles.maindiv}>
<FlatList
data={this.state.productlist}
renderItem={this.renderCategory}
keyExtractor={(item,index) => index}
showsVerticalScrollIndicator={false}
/>
</View>
<TouchableOpacity onPress={() => this.checkout()}>
<View style={{ alignItems: 'center',backgroundColor: '#473e59',height: 44,width: responsiveWidth(92),margin: 10 }}>
<Text style={{ fontSize: responsiveFontSize(1.5),color: '#fff' }}>CHECKOUT</Text>
</View>
</TouchableOpacity>
<AnimatedLoader
visible={this.state.isLoading}
overlayColor="rgba(255,255,0.75)"
animationStyle={styles.lottie}
speed={1}
/>
</View>
}
</View>
);
}
}
export default MyCartScreen;
const styles = StyleSheet.create({
container: {
flex: 1,backgroundColor: '#a5a2db',maindiv: {
height: responsiveHeight(68),childdiv: {
flexDirection: 'row',height: responsiveHeight(17.9),backgroundColor: '#eef3f7',borderRadius: 6
},TextInput: {
height: responsiveHeight(7),width: responsiveWidth(60),alignSelf: 'stretch',fontSize: responsiveFontSize(2),borderWidth: 0,backgroundColor: '#fff',borderColor: '#eaeaea',borderWidth: 1,borderRadius: 5,paddingLeft: 10,marginLeft: 10,marginRight: 10,marginBottom: 10,marginTop: 10
},moreImg: {
height: responsiveHeight(16),width: responsiveWidth(28),resizeMode: 'contain',borderRadius: 5
},navItemStyle: {
margin: 5
},price: {
marginTop: 10,color: 'red'
},lottie: {
width: 100,height: 100
}
});
解决方法
我认为这是因为它是将文件重命名为当前工作目录（即，将脚本保存到的位置），而不是将文件重命名为存储文件的实际目录。
file = your/file/name.txt
os.path.dirname(file) # This gives 'your/file'
os.path.basename(your/file) # This gives 'file'
脚本用于在上面的示例中的cwd中创建一个名为“文件”的文件夹。通过添加chdir（f），它将在此目录中创建，因为它已经存在，它将修改现有文件。你想要的是什么。
我可能是错的，但这是我的理解。我希望这是有道理的。
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